Universities usually have a single commencement speaker, but Tufts got more than it bargained for: Comic Book Guy, Moe Syzlak the bartender, Quick-E-Mart manager Apu Nahasapeemapetilon, and Police Chief Wiggum all showed up to speak to the students-channeled through actor Hank Azaria, who voices the characters on “The Simpsons”. WATCH: Bill Gates Touts Power Of Optimism…