4. Clark W. Griswold, National Lampoon's Vacation series
If we're giving points for enthusiastic parenting then Clark Griswold scores big. This is a man so determined to make his family enjoy their vacation that he hi-jacks an entire theme park at (squirt)gunpoint. Of course, some might argue frog-marching your reluctant children across America, not to mention getting them shot at, robbed and arrested, is actually frowned upon by the NSPCC. But hey, at least he's trying.
Fatherly advice: "I'm gonna have fun and you're gonna have fun. We're all gonna have so much fucking fun we'll need plastic surgery to remove our goddamn smiles. You'll all be whistling 'Zip-A-Dee Doo-Dah' out of you're assholes!"
See also: Bernie Focker from Meet the Fockers, Gil Buckman in Parenthood and Tom Baker (Steve Martin again!) in Cheaper By The Dozen.