Steve Harris from Iron Maiden.
You might not think they're prog rock, sure, but I'm convinced there's way more progrock in there than most prog
snobs aficionados would care to admit.
Then again, I am decidedly not a progrock fan, and barely know what one classifies into such a nebulous genre, but Maiden's always stood out as a little bit bigger than a lot of the other NWOBHM and "classic" metal stuff, and to me they absolutely qualify for prog. Reference things like the "Seventh Son" or "Final Frontier" albums, tracks like "Rime.." or "To Tame a Land," etc. YMMV. I'm not gonna argue, like I said, I'm not seriously into this style of music, but I do like to point out things that serious types might have overlooked.
(I'd also throw in for Lemmy in Hawkwind who, to me, gets about half of the peak Hawkwind albums that are the most progrock to me, the other half of those are Paul Rudolph, but at this point I'm willing to defer to the prog gatekeepers that I'm conflating prog with "spacerock" or "psychedelic" and, well, I am coz as I said, this isn't really a style I've cared to dig into)