A lot of the current party members are pretty chill and are totally suitable for good aligned parties. Wyll may be a bit ego-driven but he has his heart in the right place and will approve of good actions. He'll also leave the party if you take the evil path with the druid grove. Gale is also similar, being a little arrogant but ultimately still being a good person who likes it when you do things such as save the kid in the druid grove. Shadowheart is pretty interesting since despite worshipping an evil goddess, she approves of a lot of "good" actions and also generally likes it when you try to talk things out and resolve situations peacefully.
The only party members who are actually evil and probably hard to justify in good aligned parties are Lae'zael and Astarion (probably Lawful Evil and Chaotic Evil respectively). Even then I can see someone like a devotion paladin recruiting them in order to try and keep and eye on them while also following leads to cure themselves.
