I vote for the F-16 itself. It is by far the most versetile, has the largest payload to weight ratio (I think it still beats the F-18), I think it beats them in power to weight as well (but not 100% sure on that). Oh and can and usually does make mincemeat out of the F15 in dogfights. In the last several wars it was also the main workhorse.
In Desert Storm it flew a total of 13,340 sorties, which was more than any other aircraft, and flew every possible type of mission
http://en.wikipedia.org/wiki/F-16_Fi...tional_history