Yes, the English Premier League is the pinnacle of the sport! In terms of a season long competition over 38 matches, the winner we can safely say is the world champion amongst the top flight of soccer. What you are mistaking for a "league" is a European TOURNAMENT, in short called "the Champions League" though North American also has a "champions league" too, did you know? I doubt you'd recognize it as equal to the European one, as much as I wouldn't equate the English Premier League to what is referred to as the "Spanish League." But it can be called whatever actually, however a champions "league" it is not, it is a tournament.
Top to bottom, the English Premier League (EPL) is by far the most competitive 'league' in the 'world'. The European tournament doesn't determine the parity amongst each individual leagues (though indirectly it does shed some light on the matter, though beyond the scope of this post). The Spanish "league" doesn't come close. You have two outliers, which we could call 'fantasy league teams'. Barcelona and Real Madrid exist because of the unique culture in Spain that allows and encourages lopsided competition for a group of teams which they call "league" play. Make no mistake, La Liga is a "league" in name only, no more representative as the Champions League 'tournament' being a "league" (which is not). What you have in the Spanish "league" are two teams with 17 fillers. The only team worthy of respect is Atletico Madrid. And even today Atletico is tied in points, which should give you an idea whether Barca or RM could survive an entire season in the EPL, given they'd face the equivalent of a Atleticoesk match 'every' match day. Not just twice in a whole season.
Barcelona and Real Madrid each get about 140 million Euro from TV revenue, the next closest Valencia and Atletico get about 45, the lower table teams get 18. EPL has a more level distribution because frankly people tune in to watch lower table teams and see a high level of competition. Here you hardly if at all see lower Spanish matches televised, why, because the competition is a joke, which makes the Spanish "league" a joke. It is not a league at all, it is a typical Spanish system that allows for two super teams to operate in a group of teams, appearance of competition that appears as a "league" wilst racking up hollow records for those two teams (and players) because they are super teams competing against 2nd division teams in terms of parity. A goal in the Spanish league does not equal a goal on the Premier League, much less a win! It's why regularly you see Barca & RM rack up multiple goals, often multiple hat tricks. José Mourinho (generally accepted as one of the great managers currently in the sport) last year's manager who led Chelsea to the EPL title, said when he managed Real Madrid he "knew going into games he would absolutely win" and added, this is a "bad thing" because it showed how lopsided the parity is in the Spanish "league"; and made the point in the EPL no match can be predicted. A last place team can beat a first place any given match. It is why the Spanish make such a big event out of the two times Barcelona and Real Madrid play each other, they even gave it a pompous name "El Clasico", because it is one of very few games in the entire Spanish season that the outcome is not predictable. Notice even in your post you couldn't manage to name more than 3 teams for the Spanish "league". Atletico is a special case, because they play with such determination but every time they play either RM or Barca they go in as heavy underdogs.
Italy and Germany are inferior leagues to the English Premier League, I doubt you can get anybody to dispute this, however, they also have outliers, which makes my point rather nicely. Bayer Munich and this year, Juventis are examples of these outliers. But past these top 2-3 teams the drop off to the rest of their respective leagues are a significant step down.