Originally Posted by Blitzen32
Jim Harbaugh is a great example of #1 here.
He came in after Garrett and completely turned a team around by working with guys like Alex Smith. Extremely impressive.
McCoy and Fox in Denver are another great example. Most people expect Tebow to be in the CFL within 2-3 seasons, but those coaches actually won a playoff game with him.
Garrett is a great example of #2. He was brought in as some "offensive genius". That screams "SYSTEM COACH" immediately. This is why most fans who lack depth with their thoughts continue to clamor for roster turnover and getting Garrett all the right pieces to succeed.
Coaches who don't know what they're doing need to have superstars in order to look decent. Sometimes, even with superstars, they'll still fail (google: Lakers, LA). There's a reason why many great coaches can do more with much less.
Harbaugh was given a loaded roster. That might have just a little to do with his success.