100% with uberfish!
My favourite combos are
- HE + WP (no more reason needed, i think after 2 pages)
- IW + RC (health is needed badly there)
- National Epic in the biggest wonder city I have, the one with Great Library is best.
If I have a really high food city, I'll stick with NE + GT. I captured kyoto early once, it had 5 sea food resources, + some forest on the land, how can you make use of so much food without the globe??? I whipped the NE soon after that, and went crazy with artists of course. It's impossible to make a good early use of such a city without high happiness solutions, and whipping is the best possible solution (drafting is even better, but comes much later).
If I manage to, I build oxford in my most commerce heavy city.
But very often, it just takes too long to build, and oxford ends up in the great Library city.
So the combo is oxford + NE + wonders.
Wall street is late game. But it's obviously in a holy city with shrine(s). Gotta love Isabella

Since it's late, it's not really "paired". Unless Isabella was a bit far away. Then it is paired with Forbidden palace
Scotland yard is usually built in a remotely good production city, preferably near borders (i don't need so many spies at home).
Mount rushmore? Never built this one.