He/She doesn't have to be professional.
Why are they your favorite?
What is the first video/first time you saw them?
Do they have anything to do with how you ride today?
Mine has to be Seamus Mckeon, maybe Bruno Hoffman, or Chase Hawk.
References: OneGuyIlluminatiEye, robinson79, Brian Griffin, The Horror Contact, StoreBoughtChild, C_Johnsonbmx, dkTechEthan, etc.