For me, for multiple reasons, this last companion needs to be a good-aligned female arcane spellcaster from one of the standard tall races. So definitely not the werewolf.
Oddly specific, but hey, I guess it's possible we're getting a dragonborn sorcerer. We're missing a bard and monk too though, so eh there are imo just as likely.
Yes, specific, but ...
1) I want only good-aligned companions in my standard party. 2) I want no duplication of party roles within my party, especially my too-small four-person party. That specifically means no duplication of classes, or even 'similar' classes, and my PC will be the party's melee warrior, likely a paladin or ranger. 3) I want a feminine female romance option, someone not "dodgy" as discussed in a different thread here.
I consider these party and companion composition rules to be quite reasonable.
I feel ya.
I think a lot of people were expecting a traditional paragon party option (which used to be the standard).
Now I am grateful for the addition of Jaheira and Minsk . At least they threw me a well chewed bone, but definitely not even one "feminine female romance option".