The 1964-1975 and 1978-1979 Jeopardy versions, though different style scoreboards, had similar sets.
I wouldn't consider the sets of the two scrabble versions to be similar. They had many more differences than similarities. (Graphics, set design, logo, stopper counts, fonts, pretty much everything except basic game play)
Tattletales is a definite.
All of the first three versions of the Let's Make a Deal, but more closely the 80's and 90-91 versions had extremely similar sets.
If the network to syndie change in Millionaire counts, then I'd include that as well. However, that's mostly since all of those decisions come from Celador in the UK, and not the US producers.
That's all I can think of at the current moment. I may edit later if I think of others.