John Deacon, Geddy, Pete Way, Gerry McAvoy, Ronnie Lane, Rutger Gunnarsson (ABBA), John McCoy, Algy Ward, Paul Gray (Eddie and the Hot Rods, The Damned, UFO), JJ Burnel, Bruce Foxton, Mick Karn, Colin Edwin (Porcupine Tree), Paul Webb, Nick Seymour, to name a few.
As for Cronos, he actually is a decent player. I recall sometime around 1983/84, Venom met Rush, and being all star struck and such Connie say's to Geddy, "You are my biggest inspiration, I learned the whole Hemispheres album, from beginning to end!" Geddy replied "I hope I didn't cramp your style!"