The XFV-12 didn't have sufficient vertical thrust to justify the V in VTOL. The EWR VJ 101 achieved Mach 1.04, but like the Mirage IIIV (which achieved M1.3) needed specialised lift engines.
Strangely it seems the Europeans had a better hit rate than the US, they just didn't have the ability to go into series production of the prototypes that actually flew, with one spectacular exception.