Liverpool, United and Arsenal are all what they are today because of the appointment and retaining of Shankly, Paisley, Ferguson and Wenger. In terms of the most sought after silverware, Chelsea and Manchester City are literally not even half of what Liverpool and United are, and both are still a long ways behind Arsenal, even Arsenal's decades of top 4 finishes and CL knockout phase appearances don't count for trophies, imagine if they did. They might actually of become history's invincible club.
It takes the right man at the right club for such a thing to transpire though. Fortunately for us I think we have a manager who's very capable, and hopefully that potential is realised with this club, as we have a ceiling as high as English football can take you.
Aston Villa literally is a sleeping giant, belonging to one of Europe's top 25 most populated cities, not only should it be an English powerhouse, but a European one. Why do we think your Madrid's, Barelona's, Munich's and Milan's have historically dominated the worldstage? How did PSG rise to prominence? Because everyone wants to play under the big city lights.