what universities are on par with the following LACs, in terms of prestige?

Applying to College
15

Those would be HYP + Stanford.

As for equivalencies, I was talking in terms of “vibe”, not rankings…
If you want rankings, I’d say Middlebury, Bowdoin: Penn, JHU; Hamilton: Dartmouth, Brown; Colgate: Vanderbilt, Emory.