ENTXs rule the world. but ENTPs like you say bob up and down a lot more than ENTJs, who tend to have more career stability.
ESTPs are probably next because they make good impressions. But they hit a sensor ceiling. Their strategic skills are weak, but they're the best at communicating technical details.
INTJs can be a mixed bag. Bill Gates and John D Rockefeller on one hand, but also some quiet middle managers on the other. Excellent strategic skills, but many are not natural leaders the way ENTXs are.
STJs keep things running, but they're the overpromoted CEO or COO that can't make a strategic decision, and can't make the same strong impression as an ESTP. I've seen very intelligent ESTJs get stuck in middle management, with no clue how to break out.