You're both right; it's been a team effort, and all the better for it.
Going by man-hours (woman-hours!) alone, though, I have a feeling Fangu has put in the most time working on TLS. She's been one of the keystones of the whole redesign. I'm not sure what we would have done without her. So she gets my vote, but that's not to say that the others wouldn't deserve the recognition either
I went with Ryu for his work with the audio commentaries, let's plays, and audio books.
And why wasn''t hito nominated? He deserves some recognition for his translation work. I would've nominated him myself if I could nominate 4 people. But I could only nominate 3, so I nominated Ryu for aforementioned reasons, Lex for his work on the front page, and Squall of SeeD for writing many an enjoyable plot analysis and for his work with translations.