Also, best is subjective, especially over time.
When I was a beginner I loved Attack From Mars, Medieval Madness, Monster Bash, etc. But as I became a better player those games became tiresome and and boring to me. The goals were too easy and the shots were too similar.
Now I'm finding that the tougher games are far more interesting. I loved Alice Cooper for years as my favorite game. So challenging and no single game has made me a better player more than that one. The ruleset on Avengers is so deep and complex that I had to read and study it to understand it. You don't have to do that on Bally/Williams of the 90s, so maybe that's why I love Avengers so much.
OK, back to work.