H - Not many to choose from. I guess Hot Hot Heat
I - Interpol without a doubt.
J - A lot of classics here like Jimi Hendrix, Jefferson Airplane, Joni Mitchell and Jeff Buckley along with new stuff like Joanna Newsom and Junior Boys but the title goes to the queen diva, Jill Scott.
K - Kate Bush is a sure winner but very, very honorable mentions go to Kraftwerk and Kings of Convenience
L - Hmmm.. this one is a bit difficult. No sure winners here. I guess Ladytron and Lali Puna deserve some merit along with The La's.
M - Massive Attack and Mugison with Modest Mouse, Manitoba, My Morning Jacket and Mylo close behind. Morcheeba has always been a favourite as well.
N - Nouvelle Vague and Neutral Milk Hotel
O - Not many here, but damn they are good. Out Hud and of Montreal are tightly tied.
...last bit tomorrow.