Tyson's style made him more suseptible to be beaten by a guy like Buster Douglas than it did another slugger

HOWEVER

For your question about why didn't anyone "set alight the heavyweight division lik ehe did" well that's painfully obvious people got bored of Ali and Holmes and all of their shit talking ending with UD's instead of KO's. Tyson was exciting to watch but who did he fight? And how did he fair vs guys who were at the top in his generation of fighters?

Tyson is the Dan Marino of his era...he's flashy people pay attention to his great feats of ability but he was never able to "win the big one" when compared with Holyfield (Joe Montana - not flashy but did enough to win) and Lennox Lewis (John Elway - struggled to win but once he did he dominated) he's just not on their level. Yes he was the youngest heavyweight champ ever but thanks in part to the lack of any good heavyweights out there and extremely good match ups for him done by Cayton and Jacobs.

I don't rate Tyson in my top 5 or top 10 but he's definantly top 15