1. ETH Zurich
2. EPFL
3. Cambridge
4. Oxford
5. Imperial College London
6. TU Munich
7. TU Delft
8. KTH Sweden
PS: I have a MS CS from one of the above.
PS: I have a MS CS from one of the above.
I've been both at Cambridge and Oxford. I think Oxford has had a much better CS department for a number of years. A lot of Cambridge faculty was hired by Microsoft Research long ago and they never recovered. Google Brain has also drained a lot of their talent lately, mostly from the Engineering Department.
Oxford has tons of famous people now: Luca Cardelli, Marta Kwiatkowska (formal methods), Yee Whye Teh (Bayesian non parametrics), Dan Olteanu (database systems) and others.
As for mainland Europe, I agree ETH and EPFL are probably among the top. I would also consider French CS, which is super good. Any French department associated with an INRIA in the topic you are interested in might be a great choice. In particular, ENS Paris might rival with ETH or EPFL in terms of quality.
Lots of smaller Scandinavian, German and Belgian / Dutch unies might be a great choice too. E.g. UCL Louvain, DTU, etc. It really depends on what you wanna do.
H-index on google scholar?
If you wanna disclose your area of interest I may be able to point you to some departments. Contact information is in my profile, if you prefer email.
That said, QS break down their (global) rankings by subject. Below is the link for computer science.
https://www.topuniversities.com/university-rankings/universi...
There's no easy way of telling how much better the nth-ranked university really is compared to the (n+m)th-ranked one, but it could be informative nonetheless.