Compared to the other classes, when has Heavyweight NOT been a disappointment?

Just a little something I've been thinking about lately with all the heavyweight bashing. The common theme, paraphrased, seems to be this:

"The heavyweight division's usually great; why does this one suck?"

This is the fun saying to pick apart, because if we go by strictly skills and depth, there hasn't been a time in the past 100 years when Heavyweight produced the caliber of fighters the lower weightclasses did. Not one. Why? Because a HW doesn't need to be a rounded fighter to succeed like he would almost always need to be in a smaller weight class. Take the sacred cow of Heavyweight skills, Muhammad Ali, when his movement went away. He was reduced to taking a ton of damage on the ropes and covering up and never really knew how to fight on the inside because he never had to. He was bigger and faster than most of his opposition. He had great skills- for a heavyweight- but not the kind of all around skills of a very good smaller fighter. It's not that he couldn't of developed them- it's that he never did because he didn't need them. That's a common theme of success only in the Heavyweight division.

Here's another example- George Foreman had a jackhammer of a punch, a nasty attitude....and well, that's about it. It landed him 2 titles in dramatic KO fashion 20 years apart, something that would've been absolutely impossible in any other class. The fighters would've been simply too good to allow it. Show me where he could do anything in a boxing ring skills-wise that any top 10 Light Heavyweight of the same era couldn't.

The truth is that the dynamics of Heavyweight boxing, where one punch can change anything moreso than any other class, has lead to a ton of terrible fights because people either gameplan on landing the big shot or fight overcautiously to avoid it. It also leads to fewer overall skills being developed by the fighters, and more boring fights for the fans. Smaller fighters have to be more technically rounded and proficient because they practice their craft at a faster pace- that also leads to better fights for the fans.

What usually happens- and this is in the good times, mind you- is that there's 3 or 4 good-great Heavyweight fighters who are at roughly the same level and a muddled bunch underneath it, that, if we're fortunate, can produce entertaining matchups within itself despite the odds being against it. Once every 20 years or so we get a huge Heavyweight star, and the division becomes "exciting" again and everyone will overrate the hell out of it like clockwork.