It's quite hard to replicate a Wild Mage in Pillars, though, so Neera would have to just be a straight up Wizard.
Minsc is clearly a Barbarian, not a Ranger (in line with the now abandoned trope of casting savage Fighters as Rangers in AD&D), so making him a Barbarian, with proper Frenzy, seems more fitting.
There's Tiax, a Priest of Skaen (which also fits with his real class, Cleric/Thief), who is (nominally) in both games.
Garrick, a flimsy Chanter with low Intellect would be quite fun, as well.
As for the PC, Sarevok does sound like a fun idea. Either the BW Paladin could be good, with very high Might and Resolve, and decent Intellect, or just a straight up Fighter. That is what he is in BG1/2 anyway, and it fits his role of being an offensive damage dealer.