Never really got into the action shows, so I guess my answer would be MacGyver. I've never seen The American Hero though, which looks awesome.
The Greatest American Hero was hilarious. I actually voted for The Incredible Hulk because I watched that show the most out of any of these on the list. There were some real cheesy episodes of The Hulk, but you can say that about ALL these listed. I guess that's what made the 80s what they were. hehe
Added Hawk. Is that Avery Brooks on the left?! I didn't realize he was that old...
Yeah, he's getting up there now. IIRC Hawk had his own show at one point, and Avery Brooks returned to the role during DS9's run in the 90s for a Spencer for Hire special TV movie.