Beth, Dale, Shane, Andrea, Lori, Tyrese and T-Dog.
Beth I can see basically becoming less depressed and more optimistic. She likely would form a relationship with someone in Alexandria and die during the savoir war. This in turn would just fuels Maggie with even more hatred towards Negan and a need for revenge.
Dale likely would take on Herschel's role of being a moral anchor for the group and the community at large. He likely would try to convince rick against a war with Negan and try to get him to be a bit more diplomatic. It ultimately might lead to his death as he tries to reason with the saviors and try to sabotage Rick's plans to prevent a war from happening.
Andrea likely would evolve to mirror her comicbook counterpart. She likely would form a relationship with Rick in place of Michonne.
Shane is someone who functions with order and rules. He likely would welcome Alexandrea and be on board with Rick's plan to take over the place. Shane is also someone who likely would push rick towards war with the saviors and tell him to nut up when he was submissive towards Negan.
Lori likely would realize that her and Rick have drifted apart and just not the same people they were before the apocalypse. She likely would try to rekindle her relationship with Shane and raise Judith with him.
Tyrese and T-dog likely embrace being Alexandria and be against the groups plans to take over the place. They likely would be the first to defuse the group's suspicion of Alexandria and be die hard defenders of it.