Consider how much an admissions spot at Yale would sell for on the open market (special donor consideration starts at the 8 figure mark). Go to Yale for $10K per year. Congrats.
If you’d been accepted SCEA to Yale. Would you be having doubts now?
There is anecdotal evidence that Yale can be a letdown if you haven’t drunk the kool-aid:
http://talk.collegeconfidential.com/yale-university/2179548-think-twice-about-yale-p1.html
OP wrote in post #11 above:
“I am interested in studying government and international relations.”
Your intended area of study suggests “Yale”. Lots of connections.
If OP wrote about interest in Greek life, tennis, and concern about paying $10,000 per year, then I would recommend W&L.
Nevertheless, a recession is likely, therefore, free plus $7,000 is a reasonable decision for an elite LAC.
Interesting that UPenn for $5,000 does not incite any discussion.
I really do not think that there is a wrong decision among OP’s four options, but there is a right decision for OP based on personal preference.