Naveed Lalani (Nubs) has never failed to impress me with anything he has posted here despite often having a darker and more graphical style than I usually prefer. I suppose that has to be a sign of a good designers, someone who can make you like a style your not really into.

Hjalmar I like too, he's done some great work.

I used to really like the designs from rosem too - excellent designer but obviously no longer a member here.

They are just some that I can think of at the moment that haven't been mentioned, I'm not good with names though so can't really think of my favorite TF designer at the moment. If it comes to me I'll post again.