My answer will be Kenpo vs non Kenpo/ Canada vs US, In Canada for Kenpo is Jamie Seabrook non Kenpo Mike Bernardo. States side Kenpo, Larry Tatum non Kenpo, Prof Wally Jay.
Here is my list of the most impressive martial artists I have personally met and trained with:
1. Robert Bussey
2. Mike Wadiak (Isshinryu Karate)
3. Ron Nagrodski (Isshinryu Karate - best instructor I know)
2. Royce Gracie
3. Jeremy Horn
4. Bill Wallace
For those of you out there who have meet Al McLuckie in my opinion he is the most amazing martial artist that I habe personaly see.