I go for musicality over technical ability any day. I have been playing guitar for about 50 years and have gotten to be fairly decent. Of the top 3 guitarists I am listing 2 have been major influences in my playing and the last one is too young to have influenced me much but has taught me some slide techniques.
Guitar:
Eric Clapton
Jerry Garcia
Derek Trucks
Bass:
Flea
Oteil Burbridge, Allman Bros. Dead and Company, incredible player.
Either John Paul Jones or Paul Mcartney
Keys:
Chuck Leavell, played with Allman Bros, Clapton, Stones
Jeff Chimenti, From the Dead family and arguably the best musician on the stage in any of their recent configs.
George WInston
Drums:
John Bonham
Stewart Copeland
Kieth Moon, possibly more for his out sized personality than his drumming. Saw an interview with Pete Townsend where he claimed to hate Kieth's drumming because he was so all over the place and thus it fell to Pete to keep a steady rhythm on guitar. That said, Pete Townsend has been said to have the best right hand in rock guitar which is, in many ways a percussion instrument.
I know nothing about horn players other than loving Miles Davis and John Coltrane.