What was the most dangerous soviet submarine during the cold war?

You have great answers and size, my opinion, was not the most dangerous. The MOST dangerous were those whose location(s) were UNKNOWN. Size really was not important if smaller subs carrying, maybe less, missiles with adequate and/or equal capabilities with unknown positions. True, the "huge" Russian subs were intimidating, nothing more. A show of "dominate power" not necessary during the "Cold War" due to the abundance of "subs" on missions by both the U.S. and Soviets. Remember, any means of "propaganda" by both "super powers" formed opinions, to believe in "communism" or "democracy". To some "the bigger, the better" was used to convince countries and attempt to intimate. As a Navy reconnaissance pilot, Lockheed S-3 Viking, 1980-85, one mission of my crew was detection of submarines. We could care less about size, but, more importantly, where were they? Sub service is a "cat and mouse" game, in a sense, U.S. vs. Soviet, who can create a course to be undetected. Regardless of how ...  more