Humor if often defined by mood so I suppose it changes from time to time. I’ve always appreciated Frank Zappa’s humor, and I love “You Are What You Is”. I would also suggest a song called “Toast” by Heywood Banks for those who laugh at kid-like silly stuff. I also think “I’m with Stupid” by Scatterbrain is a masterpiece of humor. I guess Weird Al has the best track record of funny songs so I’ll say “Yoda” is my pick for now.