Tough one, as there are many I respect and enjoy, you know the usual suspects.
But off the top of my head just to name a couple.
1. Miles Davis (Musical Genious)
2. Charles Mingus (Musical Genious)
3. John Coltrane (Made some music that really moved me from the inside
out. Made some music I am still not mature enough to approach.)
4. A kicker...Tori Amos (I simply have not felt as deeply connected to an artist through music as with this woman, totally unexpected but what a raw and emotional introspective outpouring {earlier works especially}. I went to a concert here and there, talk about sticking out like a sore thumb. Every young woman should own "Little Earthquakes."