I know of two NF women who, hands down, are the most talented female flirts I've ever seen in action. It should be noted, however, that neither of them happen to be/exhibit pronounced N though, fwtw.
I would say the best male flirts are SFs.
What kind of flirts are they? Guys and girls flirt differently. Girls can use their bodies much more than guys and their posture (choosing among mates) is different from a guy's (displaying for mates).