OP maybe didn't manage to convey it that well but he's right in that all the NPCs available so far are pretty over the top.
Lae'zel: Stands out by being a super arrogant, vicious Gith. Also has the super secret thing that the Githyanki dragon riders are looking for, apparently.
Shadowheart: Super emo, secretive Sharran. Is very secret and has a secret and also carries around a mysterious, secret artifact. Also, secrets!
Astarion: Super edgy secret vampire guy who is so obviously an evil vampire it's kinda ridiculous. Obsessed with death, wants to drink your blood and gets real moody when you didn't let him have cursed books of Necromancy.
Gael: Haven't talked to the guy much but by all accounts he eats magical items, has a super important quest that requires him to have a resurrection contingency, and is also a bomb. Fun guy though
Wyll: Swashbuckling Warlock good guy who is obviously spying on *someone* for his infernal mistress. And that's just what I got from the initial meeting with him, my 4-man party isn't big enough for 2 warlocks