From all the info we have so far and, my personal opinion, my list is:
Shadowheart: I feel she's with you only if you didn't go in her way. The moment we have to face the Shar fanatics or do something that it's against her "religion" she'll turn against us. Wyll: He's too generic "hero" with a dark secret that it will bite him in the ass and probably make him turn against us by the succubus he serves. Gale: Another generic "good" guy that it's a power hungry egomaniac, if some choice is given between a huge power and us, he will turn against us I bet.
I think the "good" ones in the end will be: Laezel: she's the tough one trying to prove herself not wanting help, but I feel that all her loyalty for her queen and her people will be changed by a dramatic moment in the future making her question all her life decisions and in the end she will soften up and be our BFF giving her life to us and turning her back to a corrupted queen and her followers. Astarion: The typical "bad" guy that most people think is a monster but in the end he'll prove to all that he's more than a thirsty vampire wanting to pray on people for blood.
