I have to go with Dr. Perpetual Grin, as two others have already noted (ex-Dr., really). I watched a Youtube video of Dr. PG yesterday speaking on diabetes, and I agreed with everything he said (Type 2 diabetes correctable in 30 days, just stop eating sugars and grains, eat only vegetables, proteins, and healthy fats, etc.). But I couldn't get past that Manson-like grin, that Sirhan Sirhan grin--it's like he thinks he's auditioning for the role of a local TV weather-girl (no sexism here, I just prefer real people to fakes).
Lots of interesting stuff at his FB page too, including something possibly tying into the "music studio" in Miami. There's of couple of photos of Perpetual Grin with "his" Ferrari, including where he claims to be shooting a video with some pop star. So maybe a nice Miami Vice element for the film. The Ferrari, a really beautiful one, is quite a contrast to the the worn-out van and Kias MS, CWW, and JRR were piloting. MS must have thought he could learn a lot from this guy.