For me it's definitely Bowser from the Super Mario series.

Hands down

Nice to get some agreement here.

Broadway from gargoyles is <3

It depends. I think any character can be attractive if given a kindly personality and is just fun to be around, at least thats what my philosophy is :)

Me

lexington from gargoyles

Asgore~ because big softies are really lovely

Chance Furlong from SWAT Kats.

Well, statistically speaking, the most Popular Hottie kind of character has seemingly consistently been something like "the wolf-like character in a Furry themed game or anime who happens to have a slightly buff build ends up with a lot of Furry fanart trying to make them seem always super buff rather than just slightly buff."