However, fact of the matter is that the triumvirate holds top spots in rankings consistently; that's not a matter of opinion.
Williams is more selective than some of the other LACs you've listed. OP asked for the top 10 LACs, whether or not you're a "fan" of Williams or a particular program within Williams is not relevant when giving a ranking, unless you're trying to further a personal agenda.
Fact of the matter is that Williams is one of the most selective LACs and has had a reputation for being one of the best for a number of years; to not include it simply because you believe (no evidentiary basis) it to be "lacking" in a particular area is simply a disservice to the school.
I have no particular attachment to Williams, but I still recognize that most any ranking for T10 LACs should include Williams. If you want to make a ranking based on Foreign Language Programs, then feel free to state "for foreign language programs based on my own opinion".
But, you posted as though it was just a general ranking and that your belief that Williams is "lacking" in foreign languages excluded it from your list without any detailed reasoning as to why. Williams is a T10 LAC, I don't think that's an arguable point. If you want to make rankings on non-academic influences, then I don't think you would have to include Williams. However, since every academic/stats-based ranking out there includes it as a T10, I don't see why you're excluding it.
"Well, it's personal opinion" isn't quite going to cut the mark here because you'd be going against large consensus that Williams is a T10 and you would need substantial evidentiary basis to claim otherwise.
And Amherst is relatively weak in math and physics (check the course listings).