The Su 27 is inherently stable as well, but later versions for export do have a fly by wire system.
Unstable are AFAIK F-16, F-117, F/A-18, F-22, B-2, Eurofighter, Rafale, Gripen and maybe the Chinese J-10 and the indian LCA.
But I remember too well the first speculations about the shape of the Stealth and I even bought a Revell "F-19 Stealth" kit. I didnt buy the "MiG-35 Ferret", though