One of the things we used to have was the USSR, which meant we also had the Cold War. That gave us “the three-minute warning”, fallout shelters, Mutually Assured Destruction, vast military-industrial complexes, spies and defectors and assassinations, and all manner of political posturing that nowadays all looks a bit farcical but was quite scary at the time. It also gave us some very effective-looking military aircraft. On both sides. Here are some Soviet ones.
fighters

Mikoyan Mig-21’Fishbed’
(source: militarywallpapers.com)

Mikoyan MiG-25PU ‘Foxbat-C’ trainer
(source:militaryphotos.net)

Sukhoi Su-15 ‘Flagon’
(source: Wikipedia)

Tupolev Tu-28 ‘Fiddler’

Yakovlev Yak-28 ‘Maestro’
bombers

Myasishchev M-4 ‘Bison’
(source: valka.cz)

Myasishchev M-50 ‘Bounder’
(source: testpilot.ru)

Sukhoi T-4

Tupolev Tu-16 ‘Badger’
(source: Wikipedia)

Tupolev Tu-22 ‘Blinder’
(source: airliners.net)
The Tupolev Tu-28 was, and remains, the largest and heaviest fighter ever to see service. The Myasishchev M-50 was a prototype – only one was ever built. A second prototype, designated M-52, was built but never flew. The Sukhoi T-4 was also a prototype, and was never given a NATO reporting name.