Obviously CM Punk isn't a pothead, but he looks the most like the guy who would sell ir to you backstage.
Kofi Kingston definately smokes weed. I also think the Usos, Curt Hawkins, and Ted DiBiase smoke too. Basically anyone that is unnaturally laid back and chilled 24/7, despite their hectic life and schedule 300+ days a year.
The Miz dosen't smoke weed, but he comes across as a guy that would snort a line of cocaine 5 minutes before cutting a promo.