I believe Neal Schon can be included in this discussion, whereas Eddie Van Halen cannot. My evidence: The Auralmoon playlist. You'll find three and a half Journey albums and one Neal Schon solo double-album (with more of each on the way..., probably

) But where's the Eddie? NO WHERE! So yes, it is what you do with it, and while I'll admit that the majority of Schon's output has nothing to do with Prog, a lot does.
Oh, and I forgot a little of the Santana that's here.
Alan White Rules.