Um ... F-111 (Aardvark) from ye olde days of Robert “Whiz Kid” McNamara. So called “variable” sweep-wing.
The F-111 turned out to be a very capable platform, and many pilots loved it...not the worst fighter ever (as a proxy for saying it was a piece of crap airframe)
I spoke to an Aussie at Oshkosh on year, and he raved about the plane, of which they had a bunch.
It just wasn’t a good air superiority fighter, but it was a fine platform.