I agree. Your list is a good one, but my current favourite is McCoy's as well. A good burger, and the best value along that strip, not to mention their loyalty card...Yonge St., from the top of Hogg's Hollow to north of Lawrence has about 6 places.
Burger's Priest
Hero Burger
MacDonald's (not saying it is good)
Burger Cellar
Stack
And the newest and my current favourite, the McCoy Burger. Similar style to the Priest but I think it is a better constructed burger and juicier. They can cook it to order, i.e. can be cooked rarer than medium well.