Jimi Hendrix & Miles Davis were circling each other at the time of Hendrix's passing. Miles was very much into what was happening at the time between the Rock (Hendrix) and the Funk (Sly Stone). Hendrix songwriting was getting jazzier and it would've only been a matter of time before he started jamming with the "youngsters" that Miles later incorporated in his band (geez, think of it, Jimi and Hancock, Corea, Jarrett, DeJohnette, Zawinul, Williams, Clarke, Cobham....the list goes on and on!!). I've read Miles and Jimi had actually communicated about making music together. But Jimi died. So Miles sought out other guitarists to play what he was hearing in his head, and John McLaughlin winds up on Bitches Brew instead of Jimi. Bitches Brew even sounds like a title Hendrix would've used. Jimi Died in 1970, Mahavishnu's Inner Mounting Flame was released in 1971. Had Jimi lived, you KNOW he would've been all over this music! And that was just on the electric side, Gil Evans(long-time Miles collaborator) released a Big Band record of Jimi's music, so it's totally conceivable that Miles, Jimi, and Evans probably would've done some work together. Truly, who knows what would've happened. The least would've been them 'guesting' some solos' on each others' stuff, or (what I prefer to believe;), they may have changed the course of Jazz/Rock 4ever!
Anyhow, my vote's for Jimi & Miles!!