For what it’s worth, I studied oceanography and classics (Greek and Latin) at Duke and was openly gay, and I loved it. For a combination of marine biology, writing, languages, and LGBT life, it’s hard to beat on the east coast. Brown and UNC are particularly good for all of the above as well.
You’re more likely to find less commonly taught languages at universities than liberal arts colleges, and universities often have much larger LGBT communities as well. A few that particularly come to mind on the east coast:
Boston U
Brown
College of Charleston
Cornell
Duke
Hampshire (LAC but part of the 5 Colleges)
Northeastern
U Miami
UNC Chapel Hill
Eckerd is fantastic for marine biology but has limited language offerings. Other publics may be suitable but have iffy financial aid for OOS students – URI, UF, FSU, William & Mary, U Maine, UNCW, and so on. Those may be worth a look if cost truly isn’t a concern.
If you expand outside the east coast, you could add Stanford, USC, and perhaps some publics like Washington or the UCs (Berkeley, UCLA, UCSD, UCSB).