Phil Kessel. Multiple 30 goal seasons. The last three with little to no help.
Yup, and before anyone goes "BUT HE HAD LUPUL THIS YEAR!!!", a little fun fact you should know is that Lupul only assisted on 17 of Kessel's 37 goals this year. Kessel has scored lots of goals and put up points with a variety of players on his line varying in skill level (most of them have little skill at all minus Lupul) in his time with Toronto, he's shown he can produce on his own for the most part.
This. Kessel is easily the clear cut and better player by quite a margin but give Neal credit where it's due, the guy would have at least scored close to 30 goals with decent linemates like Kessel. However, what separates the two is the fact that Kessel is a great play-maker and he has proven this year that he can not only score goals but can also play a complete offensive game.