While I do believe that Leicester would probably not be first in the other leagues you cited, it's important to remember that this is an unusual year for the Prem. The Premier League's top clubs are going through a transitional phase at the moment (except maybe for Man City), and I believe the Prem will be back as a major force in Europe in a couple of seasons (specially with Messi and Ronaldo getting older and the money Prem clubs are getting from the TV deal).While I'm undoubtedly over the moon with Leicesters amazing current form, I do wanna raise the point that in all honesty we'd probably be nowhere near the top in Spain, Germany, Italy or even the French leagues! It's kinda sad how he premier league continues to decline although perhaps that could also be considered as the reason it's so exciting, because there isn't a set agenda as much anymore and you're only a mistake or piece of quality away from turning the table on its head.
France and maybe Italy but thats about it for other top leagues. But honestly its not so much leicester's match up, its the entire premier league. The game has evolved into a skilled and under control game and the premier league is a much faster paced game with less control. The way Leicester play is proof of thatExcept PSG, the French league has a really low level compared to PL, especially this year. Pretty sure that Leicester would be great competition for PSG and smash every other team easily. In France, PL is still seen as the best championship and no one would ever have the idea to consider it declining.
The Tv money will let the premier league teams buy all the players from these leagues and get better quality. If you know, the top clubs domestically don't buy them firstSpain's La Liga is by far the best football league on the world. Anyone doubting that hasn't followed european club football in the last years.
Also the Premier League title race is close for the single reason, that they lack world class teams. I can't see a single english team on the level of Bayern, Dortmund, Barca, Real, Atletico, or PSG.
If you remove this teams from their leagues, you'll also get a close and exciting league. For example Hertha would be on top of the Bundesliga then, which is somewhat comparable to Leicester leading the Premier League.
Nonetheless the Premier Leagues club will go back to the point where they've been few years ago and where the spanish teams are right now. I can't imagine them underperforming like that all the time.