both of which are usually ranked after the American colleges.
Only by Americans

There's also the Sorbonne in Paris, one of the finest universities in the world (for some studies).
Leiden university in the Netherlands.
And many others.
Each university has a specialisation. For each field of study there are those recognised as better than others.
If I were to go for a PhD in theoretical mathematics and I knew Russian, I'd probably choose a university in Moscow for example. Russia has the best mathematicians in the world.
For applied physics, MIT is usually recognised as being among the best.
For astronomy, there are others again.
For languages and international studies, Leiden is internationally recognised as the place to be.
For international law, Harvard and UCLA are important.
etc. etc.