MiG-31

Almighty "Foxhound"..Probably best in the world - Russian interceptor ..more or less: for this plane reason US Air Force decided stop the SR-71 Blackbird reconnaissance flights on Russian territory...because like one in the world could intercept SR-71 -
MIG-31 have enough strong weapon , huge range radar and big max speed for do this :-p

A plane with a lot of fuel,very good combat radius,fine radar,and that deserve all respect of it's foes in the skies,specially if fitted with 6 R-37 missiles in it's belly and R-77 ramjet version missiles under it's wings.