Brent Heuser (Chicago) is 6 ft. 7in.
Dollypop said: "The two Broadway men I admire most are relatively short. Both Patrick Wilson and Eric McCormack are about 5'9"."
I know there's a lot of "play acting" in this area, so I usually take off a couple off inches from any actor's published height.
Per his web bio, Wilson is 6'1". McCormack is 5'11'' (so following my own theory, that would make him 5'9", as you say).
Somebody recently posted a bunch of pics from THE FULL MONTY, showing Wilson taller than almost anyone else in the cast.
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