I'm assuming you're either high or next level trolling or lack knowledge of boxing history.
GOAT is more than just a stretch but not even debatable. Usyk perhaps could crack top 20 ATH considering he would of held all the belts at both cruiserweight and heavyweight. Fury has a pretty thin resume, would need to rack up a lot of defenses with only credible wins against Wilder, Klitschko and Usyk. You look at any other ATG heavy, their resumes are stacked with a lot names and champions.
Fury would not even be the best British heavyweight. Lennox Lewis has a next level resume with many wins over a handful of ATG heavyweights.
These guys records wouldn't be anywhere near as good as ATG's Moore, Langford, Johnson, Pep, Robinson, Hagler, Hearns, Lennord, Armstrong, Whittaker, Mayweather, Pacquiao, Ali, Duran, Jones Jnr,
I think the only current boxer I could see hit ATG top 10 status is probably Canelo when he finishes up. His record is stacked with names and he's been cleaning up for years.