Its really hard to test, but fighters had a CAP time ago. If they didn't change the code, at certain level (high, far beyond lvl 100), almost any base fighter with more than 200 vets should be capped, having then the same true ability in practice. Cap is still level dependant, so if we suppose caps are still there, a base 9 BVE 125 fighter should beat a X sailor base 18, lvl 115.
In the end, the most important thing for fighters is micromanaging.
Also 1 fighter pilot alone is useless, you should have at least 4. Otherwise you are using your best fighter just 1/4 of the time in the best case, or 1/6.
Now planesman has no known cap, and ships have speed cap but engineer's overheat time is uncapped. I don't know about sonarman, but I would go planes or engy.