If you want to play that game, Cowher got to several AFCC championship games "without Ben". In the 1 season where Tomlin did not have Ben for a majority of games, he was .500
Conversely, From the time Cowher got Ben, he had only 1 bad season (the dreaded "non-losing season" that Coach T. loves like his mama!) and that was the year Cowher was mailing it in pretty much due to the news that his wife was dying of cancer.
But every OTHER year that Cowher had "Ben" went like this...
Went 15-1 in 2004, lost to the cheats in the AFCC (15-1 in regular season)
Won a SB in 2005. (11-5 in regular season, beat the #3, #1 and #2 seeds on the road in the playoffs to beat ANOTHER #1 seed in the SB.)
Went 8-8 in 2006. (admittedly a truly disappointing season for Steeler fans, but sometimes you gotta take a moment and feel the death of your wife.)
So... Cowher went to the AFCC, and then the SB and then he pretty much "pretired" upon learning that his wife was dying of cancer.
Ya. I can totally see where you are going with this.