I chose Yaya.
Putting aside his behaviour, putting aside his agent and averaging out the period as fair, I think he's had the most impact.
At times, I thought it was sheer will he got us through some games, if we weren't quite clicking.
In fact, Kev's attitude reminds me of him!
The fact he could morph into Fern's, Kev's, David's or Gundo's style of play at any given time was astounding to me!
An eye for a pass, the intricate play, the hold up? Could tap in, head in, scream one into the top corner AND take penos!
He had some twinkle toes that one, especially for some great big lump of a man!