Istari
Lore MasterHalflings are supposed to have a remarkable tolerance for alcohol, I'm sure I read/played somewhere.
Mystagogue
AcolyteWhat with Mr. Merry and Mr. Pippin getting drunk and spilling Mr. "Underhill's" real identity, I'm not sure I'd put too much stock in such claims!
Especially once they'd learned beer actually comes in pints!
Even Elves don't take a whole lot of the fruit of the vine to merrily doze off from their work, as Mr. Bilbo once learned.
Orcs are likely no better.
I'd suspect that Dwarves can hold their drink pretty well.
Shadow Lord
Dark LordDwarves seems like the "correct" answer