Just gonna list members of 'the group' (as in, all groups Clem has been a part of - she's the constant here) and list off their statuses. The wiki version gets a bit annoying as they're all separated into different subgroups.
Alive or Dead (Determinant) Alive Dead Undead Unknown (Presumed Alive) Unknown (Impossible to tell) Dead or Undead (Determinant) Unknown (Presumed Dead) Unknown (Presumed Undead)
Lee - Lee was either killed by Clementine or left to turn.
Clementine - Clementine is confirmed alive. Last seen being imprisoned by Carver.
Kenny - Kenny is confirmed alive. Last seen being imprisoned by Carver.
Katjaa - Katjaa committed suicide.
Duck - Duck is either killed by Lee or Kenny or is left in the woods.
Glenn - Glenn is killed by Negan in the comics.
Carley - Carley either dies in the drug store or is shot by Lilly.
Doug - Doug either dies in the drug store or is shot by Lilly.
Lilly - Lilly is last seen stealing the RV or left on the road. It's been so long we can't be sure of her status.
Larry - Larry is killed by Kenny via Salt Lick.
Mark - Mark is currently undead.
Ben - Ben can either be dead or undead. If you drop him he is devoured by walkers and likely turns, if you save him he is shot in the alleyway.
Chuck - Chuck commits suicide in the sewers and is then devoured by walkers.
Omid - Omid is shot by Michelle in a bathroom.
Christa - Christa has an unknown status but it's presumed she will return later.
Molly - Molly was either seen shot in the shoulder, running away from walkers or leaving the mansion alive. We cannot be sure of her fate.
Vernon- Vernon was probably killed by the horde during his boat-stealing antics. His group admits he is dead.
Brie - Brie turns into a walker and is killed by Lee in that state.
Luke- Luke is alive and with the group.
Carlos - Carlos is shot in the neck and then devoured by walkers.
Sarah - Sarah is presumed alive, but she ran off and we don't know where she went.
Nick - Nick is either alive or devoured by a zombie outside the Ski Lodge.
Alvin - Alvin is either shot by Carver or shot by Hank.
Pete - Pete either dies at the river and ends up reanimated or is eviscerated by zombies and is shot in the head by an unknown assailant.
Rebecca - Rebecca is alive, and is last seen imprisoned by Carver.
Matthew - Matthew is shot in the neck. by Nick.
Walter - The nicest man in the apocalypse was shot in the back of the head by the worst man in the apocalypse, Carver.
Sarita - Sarita is alive, and is last seen imprisoned by Carver.
Mike - Mike is alive and with the group.
Jane - Jane is alive and with the group.
Andrew St. John - Andy can either be killed by Lee or is left to be attacked and turned by Walkers.
Danny St. John - Danny can either be killed by Lee or is left to be attacked and turned by Walkers.
Brenda St. John - Brenda is turned by a walker Mark.
The Stranger - The stranger is either left by Lee after being strangled, shot in the head by Lee, or shot by Clementine.
Jolene - Jolene is shot by Lee or Danny.
Roman - Roman is found dead at the river bank. It is presumed he was killed by Carver.
Michelle - Michelle was shot and killed by Christa. It is unknown whether Christa left her to turn or shot her in the head.
William Carver - Carver is dead. He was killed by Kenny.
Troy - Troy was killed by Jane.
Johnny - Johnny was shot in the face by Kenny.
400 Days Characters
Vince - It is presumed that Vince is alive and escaped Howe's.
Justin - Justin is either turned by walkers after his leg is amputated or he runs off to find shelter.
Danny - Danny is either turned by walkers after his leg is amputated or he is killed later on.
Marcus - Marcus is shot in the head by Clyde.
Jerry - Jerry is killed by Marcus and then his undead form is killed by Vince.
Bennett - Bennett is either killed by Nate or dies after being hit by Eddie's car.
Clyde - Clyde is killed by either Bonnie or Russell.
Wyatt - It is presumed that Wyatt escaped Howe's.
Eddie - Eddie is presumably alive as he appears in the slide for Episode 4.
Nate - Nate is likely alive and is on his own.
Russell - It is presumed that Russell escaped Howe's.
Walt - Walt is killed by Nate - either to reanimate or he is shot in the head.
Jean - Jean turns into a zombie after a wound inflicted by an unknown assailant, possibly Nate.
Shel - It is presumed that Shel escaped Howe's.
Becca - It is presumed that Becca escaped Howe's.
Boyd - Boyd is either killed by bandits or has an unknown fate.
Clive - Clive's fate is unknown after 400 days.
Joyce - Joyce's fate is unknown after 400 days.
Stephanie - Stephanie is either shot by Shel or presumably Roman.
Bonnie - Bonnie is alive and is with the group.
Leland - Leland is either killed by Roman or runs away from the 400 days group's camp. It is unknown whether he made it but it is unlikely.
Dee - Dee is killed by Bonnie. She is likely shot in the head to prevent reanimation.
Tavia - Tavia is last seen shooting from the roof of Howe's. She is presumed alive.
Howes DIY Store (Presumed, EP3 Spoilers)
Tisha - last seen shooting from the roof of Howe's. She is presumed alive.
Hank - last seen shooting from the roof of Howe's, or shot by Alvin.
Tyler - last seen shooting from the roof of Howe's. He is presumed alive.
Vera - last seen shooting from the roof of Howe's. She is presumed alive.
Lowell - last seen shooting from the roof of Howe's. He is presumed alive.
Sunshine Trailer Park (Presumed, EP4 Spoilers & Leaked Names)
There are a few errors here. Carley and Doug are both dead or undead determinate, as nobody puts them down when they get ate.
Matthew is undead.
Troy is undead.
400 Days Danny is either dead or undead, not simply dead, as the color of his name implies.
It's also possible that Bennett's walker is still alive at the pit stop, as he and the old man that Nate shoots in Russell's story can both be one of the watch dogs in Shel's story.
It is very clear that Jean died of Nate's bullet.
Stephanie is technically unknown, if Shel does not kill her. We never witness Stephanie die if Shel leaves, and with the defenses down, it is possible that she escaped. Although she should be PRESUMED dead, we cannot be sure.
Leland surviving is just as likely as Lilly surviving.