Aizen always gets his way. If he wants, he can change the definition of troll to Aizen, or just remove troll from the dictionary all together and just have "Aizen".
Both received a higher power that made them gods and both were defeated by the main character. But I would say obito cuz the way he was defeated didn't make sense. Aizen defeat was more acceptable
Aizen was trolling dudes for thousands of years plus he had that "I planned you would do this" shit going on, Tobi had that epic Goofy persona tho, idk cant decide.