Well it would be hard for me not to, seeing as I feel Stevie Ray Vaughan was the greatest guitarist ever, bar none - and he considered Hendrix his musical master.
But I think SRV was better than Hendrix, better than Page, better than anyone. And Double Trouble was spectacular as a band. But they were more traditional blues, and still growing when Stevie died, even though they were filling coloseums at the time.
In contrast, Zepplin was a monster from the beginning, and roared straight through at that level right up until Bonham's death. As a unified band which was not based upon a single star performer, IMO, they were the top of the top.
Oh, and as an aside, a "cover band" is one that generally does not create it's own work. The Blues is based on standard riffs and songs that are repeated forever by each band's version - it's not the same as a cover unless you're actually trying to imitate a specific band's version, rather than the riff or song itself. That's just a fact. And Zepplin's interpretations were so unique, to call them a cover band isn't even an insult - it's ridiculous, and just plain ignorance of the incredible uniqueness and creativity of what they were actually doing.
But I look at it this way, no Hendrix, no SRV. Hendrix created something out of nothing, nobody did what he did before, SRV merely stood on the shoulders on giants. Was he technically a better guitarist, maybe, but not nearly as original as Hendrix.
SRV was not nearly as good as Hendrix. You must not be familiar with JMH’s body of work.