You should never, never, never make a poll of this, you can't include all good tilesets/lvls/makers. And you shouldnt do a poll with levels and tilesets together.
There are much good tileset creators not in that poll so....
THIS POLL SUCKS

erm.. I voted other.
But I think Agama is the best tileset creator.
But he/she has left so we will have to look forward and look to other good creators who still DO make tilesets.