Fury, of course. But now you'll end up with the Fury's height conspiracy theorists. Some of them are seeing Usyk's inactivity agenda.
Fury by half an inch according to the experts: Fury 6ft 7.5ins - https://www.celebheights.com/s/Tyson-Fury-49113.html Vitali 6ft 7ins - https://www.celebheights.com/s/Vitali-Klitschko-47285.html
Measured with miles between them, likely Fury. Standing face to face within arms reach? Vitali would dwarf the charlatan.