I guess the Russian weren't impressed by its Delta wing, perhaps they got their tandem main gear design from the Viggen. But well, it is always good to know who you are up against. The Viggens did a lot of intercepts of Russian aircraft, and even a SR-71 or two.
I guess I am going to vote for the Viggen, to get back on the subject, but only if short landing, turn-around, and short take-off are included. Otherwise one of the Sukhois.
Russian sub being checked out: