Honestly, I can't think of any. I think that's because some of the influences have been so popular that folks have statted them up in one form or another.
Aside from the D&D lines like FR, DL, Greyhawk, & the like, there's already been stats for Fafhrd & the Grey Mouser (licensed through TSR), Thieves' World (the Chaosium supplements, and now the new game), Myth Adventures (Skeeve cropped up in a 1E 3rd-party supplement, IIRC), Ultima (well, it's a computer game, so they're statted up through that already), Conan (TSR & various other sources), Beowulf (couple of Dragon magazine articles on `em), Lord of the Rings (the various RPGs for the books, as well as the massive fan-made stuff for d20), mythology (Deities & Demigods, ad nauseum), Elric (the oops in Deities & Demigods), Robin Hood (Dragon again), as well as a fair number of other characters from literature and legends (the old "Giants in the Earth" articles covered a LOT of ground, IIRC).