Bell put forward a design for a P-52 that is *almost* twin boom but could have made it with slight changes. Most interestingly the air intakes were in the front of the aircraft and the engine was a pusher, perhaps the frame could have accepted a jet engine later on.
The Fokker G-1 type was designed as a fast, heavy fighter, or in Dutch: "Jachtkruiser", litterly meaning:"Fighter Cruiser". It was roughly the contemporary equivalent of the Bf-110 of Messerschmitt.