hi everyone.
i have another question which isnt necessary about discussing the endings, its more about the lore/roleplay in terms of the "return to Avernus"-ending.
a little background: im almost finished with my evil Dar Urge solo run and for my nextrun i want to play with only one companion (basicly Duo Tactician). i decided to pick Karlach and aim for the "return to Avernus"-ending (imo the currently best ending).
while thinking about which class i should pick, i came up with the question (which is the reson for this post):
"Which class would be a good choice to assist Karlach in Avernus?" i want to say, that i dont know very much about dnd lore, spontanous i would say paladin or cleric?
as a player, i hope not, since i played too many of them already

as a quick bonus question: are their any benefits/advantages for a redeemend Dark Urge (choosing the good path)?
since they were 1) a bhaalspawn and 2) not giving birth to, instead they were created by bhaals blood directly; if i understood the story correctly
a big thank you in advance for every answer
PS: in case the answers are to big or someone have th feeling, that this pot disrupts the main topic too much, send the answers as a personal message (if possible, still dont know exactly, how this forum works)
EDIT: to clarify, the questions are about the lore about avernus/bhaalspawns/ and so on. of course, ingamewise i could play any class i want.