Gonna have to think about that for awhile - but off the top of my head the contenders would be:

Undivided
Have a Nice Day
One Wild Night
It's My Life
Whole Lot of Leavin" (some of Jon's best writing IMO)
Love's the Only Rule (also great writing)
Broken Promiseland
I'm With You

And I'm already noticing that these are some of the best tracks (IMO) from each record.