I would certainly write home about them, and I have, my mom has asked me to please stop.
the only time I can think of where he would be considered "great" would be the 91-93 period where he had 3 Hall of Famers and many more outstanding players to coach. His OC stints with the Chargers,Dolphins, and Niners are nothing to write home about.
He brought the Niners a top 10 offense in 2006 after being terrible and shut out many times the years before. He took the Dolphins to 10-6 with frickin Jay Fiedler at QB. The only bad stint was his year as OC for the Chargers, but they were coming off a 1-15 season and were just an absolutely dreadful team.