I'll just say my list is going to be all over the place for various reasons:
Chicago x 2
Beach Boys - Too many times I lost count
Goo Goo Dolls x 1
54-40 x 1
Creed x 1
Came close while I was on vacation this summer to seeing Lifehouse play in Cleveland but then it got rained out. My biggest problem is I'm 2.5/3 hours from Toronto and occasionally some bands play Barrie/Orilla which is an hour away so for me it tough to get out to concerts because I either have to book off work or get home really late.