No combat aircraft has such a record in A2A combat as F-15. It is totally in its own class, or even, a couple of classes above the next ones..
They usually use the Kill ratio. The tomcat claims an amazing 164-1 kill ratio, (159 kills by Iranian F-14s to 1 los)..(Farzad Bishop).
The F-14 was lost to engine stall then gunned down by a Mig-21. Iraqi pilots made more kill claims but not yet verified.
The F-15 ha a reported 105:0 kill ratio (At least an Israeli F15 was severely damaged and had to make emergency landing), Syrian Mig-23 and Serbian Mig-29 pilots made kill claims but they were never verified.
Book: F-15 Eagle Units in Combat
By Steve Davies
Jul 8, 2004, 08:57
But it's worth being noted that the F-15s and the F-14s never met their match in real combat.