cTrix, because he's extremely modest, very helpful, really reaaaaally smart, a wonderful host and awesome guy in general.
Some older chiptune guys, because they're a constant inspiration, some names:
radix - really talented musician overall, and probably one the best melody writers in chiptune I can think of.
malmen - Amazingly talented guy that can really put a finger on the melodramatic side of things while still touching that happy side. Extremely well executed harmonies and melodies in basically every style he tries.
joule - Very knowledged guy on music in general, very theoric approach to music and as far as I know him, really perfectionistic as well, which results in super thought of tracks that are good through and through.