Pixelartists: forget about them.. seriously.. I'd wish there were more of them, but those we have do close to nothing, and those we don't have aren't very practical.
Chipmusician: not that many, MSX never was a chipmachine regarding music. This was due the presence of FM-Pac/MSX-Music, SCC, Music Module/MSX-Audio, Moonsound, all chips that don't require chip'ness.

Recently ppl started on PT3 music for the PSG, but there're only a handful of ppz doing so, and they're already occupied with their own club, I think.
Coders: finally
this is not impossible as there're quite a lot of programmers around, but: many are part of team already or don't want to join a new one.
Only chance you might have is first showcasing some stuff you did, perhaps someone gets interested!