F - Flying Lotus || Four Tet is a very close second
I - IWPSS (Can't find a single video/link to a track)
K - Kashiwa Daisuke || Extra Song 1 || Extra Song 2
M - Madvillian || Honorable mention: Moderat
N - Nickel Creek || Old favorites never die.
U - Ultraesthetic || No YT Links, so go to the source!