I’m leaning towards Big Sam. I remember reading an article about how people have him incorrectly labelled.
People see him as a one trick pony, a long ball specialist who saves teams from relegation. This is certainly true in season one, but not so from there on. In season one he gets the job done. He gets the results needed to bring stability. From season two however he then starts adding more creativity, playing a more enjoyable style to watch.
For example at Bolton he started bringing in the likes of Jay Jay Okocha, etc. He did the same at West Ham.
The issue is with the last few clubs (Sunderland, Palace, etc) he has never had chance to show what happens in Season two onwards, so he is still seen as a one trick pony...