Since I too really consider Clapton a Gibson man, I have to say David Gilmour, followed by Rory Gallagher and Jimi Hendrix.
So many greats playing Strats, though. Some other personal favorites are Jeff Beck, Buddy Guy, Stevie Ray and Jimmie Vaughan, Ritchie Blackmore and the Danish guitarist Franz Beckerlee. Beckerlee was the guitar player for Denmark's biggest rock band of the 1970s, "Gasolin'". Singing mainly in Danish, they were immensely popular in Scandinavia.