The best player is Clay Matthews without a doubt.
Last year it was Woodson, but Woodson has been lacking in his coverage skills. He's still one of the most complete DBs in the league, certainly the most complete CB in the league.
But Matthews is the most complete OLB in the league, and he dominates in every aspect of it.
He's amazing as a pass rusher.
He's amazing as a run stopper.
He's very good covering.
His ball skills are tremenduos.
His overall play ability is off the charts.
Both Woodson and Matthews are old school players. They could play in the 40's. Woodson can be a Wr, Matthews probably could be a TE. They're just football players.
But Woodson is clearly declining, whereas Matthews is only getting better (yes, it is scary).
Raji deserves TONS of props. He has been a beast lately. There isn't a DT that's playing better than him right now. There are some who are playing as well as him, Wilfork, Suh to name a few, but nobody is playing better than Busari right now.