When rated among their time and peers, sure...maybe. I think Buddy was doing stuff a lot of his peers weren't doing at the time, but the scope of drumming was a bit narrower back then - there wasn't a lot of focus on weird polyrhythms or odd meters, or anything too fancy, just speed and licks, and doing some amazingly fast acrobatics around the kit, and Buddy excelled at that. Neil, on the other hand, compared to other rock and prog drummers of the 70's and 80's, did a lot of the same stuff Neil was doing, but a few might have done some things better. Neil excelled in some aspects, but I think other drummers like Bill Bruford or Terry Bozzio did some things that Neil was not doing, either because he couldn't or just didn't want to/wasn't interested.
I think if Buddy and Neil were of the same generation of drummers, it might be a tight race, but I think Buddy was just slightly ahead of everyone during his time while Neil was at the front with others. However, I'm sure a topic like this could never be truly objective considering both drummers were from different times, and that Buddy even directly influenced Neil.
Then again, I could be WAY OFF BASE here as I'm not as intimately knowledgeable about Buddy Rich as other drummers here might be, but I do know he was an amazing drummer with great showmanship and insane chops! During my high school days, when I started learning drum set, I watch a TON of drumming videos online (before YouTube made them easily available), and Buddy was one of the few I focused on a lot (with Neil being another, of course), so back then, I probably could've told you more about him than I remember now.
-Marc.