What universities/academies have the best American actors come out of?

That is a good point. I get what you mean. Italy has very good universities, but my main concern is that they do not offer acting programs. Of course I can take other paths (literature, foreign languages, medicine, etc.) but I would end up with quite a different curriculum.
There do are four great acting academies but they only accept around fifteen/twenty students in a pool of more than eight hundreds. Also, I am interested in acting and, maybe, directing but not in other careers: I mean, I may consider them for a living but as of today they’re not what I’d choose.

What I like about the US is that universities give students the chance to mix up their curriculum with a variety of subjects, which are not directly related to their own major: I think it is important for an actor to also have some literary knowledge, for instance. If I were admitted to Harvard or Yale, I may also consider taking a different route in order to receive a broader formation.

With that said, I am also applying to college in the US because I’d like to get a breath of fresh air and go abroad, I think I would have more chances to do what I love than here and I have the general feeling of a charming place (kind of the “American Dream”, ahahah).

I don’t know if that makes sense… Anyway, it’s surely a great idea to go for a Graduate degree and I’ll do that if I am not admitted / I can’t afford an Undergraduate education in the States.