Quickest from brakes off to 1000' agl?

[A2QFI]

I'd put money on a clean F-4 with a side-bet on a lightly fuelled PR9. The first one delivered to Akrotiri in 1964 did a low overshoot and was about 10,000 ft at the end of the 9,000 runway. I do appreciate that this is not the same as a standing start but it was pretty impressive.

[ORAC]

I reckon the Harrier GR3 could have done the brakes off at 999ft thing, and it was, of course, fixed wing....