<Randy Rhodes was fretboard tapping well before Eddie.>
Maybe, but nobody heard it. Quiet Riot was in reality a failed band until 1983.
<That debate alone keeps Randy in the conversation.>
You are entitled to your opinion. I personally think that is a silly reason to keep him in the conversation as one of the best guitarists of all time. You ever play guitar? Fretboard tapping as you call it is something that any kid who picks up a guitar learns almost immediately. It doesn't take too much skill.
Again, I will say that I am not saying he wasn't a good guitarist, but best of all time?? Not really.