I like to live in a world where he never existed.
Warrior: Well, almost anyone not specifically shown to be a member of another class. Varian and Garrosh maybe?
Hunter: To me it's still that nameless Dwarf from the original WoW launch cinematic :P
Shaman: I'd say Thrall.
Rogue: Garona of course
Mage: Like, heaps... I guess Jaina is the most prominent.
Druid: Yeah Malfurion. Although Hamuul got a fair bit of screen time in Cata.
Monk: Shame on you! Obviously it's Chen Stormstout!
Warlock: Gul'dan. Pfft as if Teron Gorefiend was a Warlock...
Priest: Mmm, I'd say it's Anduin now.
Paladin: Again, heaps of these. I'd go with Uther too.
Death Knight: New kind - Arthas. Old kind - Teron Gorefiend.
---------- Post added 2013-05-24 at 05:01 AM ----------
You mean a cleric? I don't remember any named clerics.