HH - Those were mostly multi-role, although I'll grant the Tomcat (I wasn't thinking Navy). Even the early F-15 and the F-22 were air-superiority rather than bomber-destroyers.
And the MIII was a pure, not tailed, delta, a configuration the Sovs hardly even tested.
E.g, if you want to lift X,000lb/kg of weapons from a short / rough strip using 1970s technology, you’re going to end up with swing wings.
Unless you're Swedish.