4. Tim Gunn (Project Runway, Lifetime)
What would Project Runway be without Tim Gunn? Short answer: Canceled.
Long answer: Tim Gunn is the moral support for the sleep-deprived, stressed out fashion designer contestants who probably have recurring nightmares about host Heidi Klum chasing them around the Fashion District with one of their worst designs while screaming, “Auf Wiedersehen! Auf Wiedersehen!”
Without Gunn's help, someone would have surely killed another contestant for using one of the sowing machines for too long, and murder is where we draw the line when it comes to good reality TV. Plus, his catchphrase “Make it work” has changed the lives of countless individuals all over the world.