Happy Gilmore is his best IMO. Big Daddy and 50 First Dates are very enjoyable though.
The rest have their moments, but generally have something about them that puts me off. Like, Zohan is too spoofy/OTT, Wedding Singer too earnest/sappy, and Anger Management has an absurd plot resolution etc etc...
Punch Drunk Love is a different kettle of fish altogether though... Nice piece of work, but not really something that can be put alongside his 'Happy Madison' films for comparison.