The highest ranking Irishman in the RAF that I have heard of was Air Marshal the Earl of Bandon, who was quite a legend. A bachelor but, I believe, well acqainted with the ladies.
The best known story was from when he was AOC 205 Group in the Suez Canal Zone in the 1950s. He held a brthday party in the Fayid Officers Club and invited reps from all the squadrons. A really wild hooley ensued in the upstairs bar overlooking L. Timsah. A guards regiment were having some sort of formal commemorative dinner in the dining room downstairs and their ritual was disturbed by the noise. An emissary was sent upstairs to quell the disturbance. The Guards officer, in all his mess kit finery, damanded to know who was the senior RAF present. A bedraggled figure without jacket or badges of rank, detached himself from the scrum on the floor, and replied to the guards officer:
"I am, I suppose, and who the hell are you?"
"I am Major the Honourable Blenkinsop-Braithwaite" (or somesuch)
" Well I am Air Marshal the Earl of Bandon, which has you f***ed on two counts. So pi$$ off!"