No one is putting Ambrose behind anyone less than ATG. Subz is putting him in the 8-10 range which isn’t really that much of a stretch.
It is though.
Marshall
McGrath
Hadlee
Steyn
Ambrose
Imran
Donald
Lillee
Garner
Wasim
Lindwall
Trueman
Make the argument for anyone below to be objectively better.
Imran was not top 10 great outside of Pakistan, he averaged 25 away from home and didn't average below 24 in any single country except for 3 tests in minnow SL. If Ambrose lacked penetration, with his 54.5 strike rate, Imran couldn't have been much better at 53.7. He averaged 28 in Australia and India and even including his home tests averaged over 24 against 4 out of the 6 test teams he played with a strike rate of over 60 vs 3 of them.
Donald played in the same era of one Mr. Ambrose and a comparison of their records vs Australia is instructive, and he wasn't quite as destructive vs England. But against everyone else he was superb. Like Ambrose he doesn't have a broad overseas portfolio with over 5 tests in only 3 countries and not quite matching the big man in any of those 3. He did perform well in India in his limited opportunities. Donald was brilliant and the most underrated bowler on CW, and probably does deserve to be higher, challenging the 3 above him. But he doesn't come close to Ambrose's performances vs the best team of their era and wasn't quite good vs England. Plus no one from that era placed him above Curtly then or now.
DK lillee was one of the pioneers of the modern fast bowling revolution, he brought passion and fire back into the game and ignited rivalries (and a dynasty, can't win them all, lol). But he's also one of the most over rated players in the history of the game (outside of cw). If Ambrose's over seas resume is light, Lille's is practically non existent. He played all but 10 of his tests in two countries, and 5 of them were in NZ. He also primarily played vs three countries and averaged 30 and 27 vs two of them. In defence of the great man, he too had his health challenges and more than proved his brilliance in WSC cricket and lots of ROW encounters. He was capable of carrying an attack and was lethal when paired with Thompson. He however doesn't have anything on his test record to match what Ambrose did to Australia, though his record vs England is equally impressive.
Garner was always the sidekick, an exceptionally accurate and dangerous one and undoubtedly one of the best in history, but the no. 2 all the same. As excellent and under rated as Garner was, there's no argument here.
Wasim Akram, the enigmatic one. The greatest left handed bowler of all time, quite possibly the greatest proponent of reverse swing and most skilled fast bowler ever. Results wise he's not in Ambrose's class. Again, same era, omitting sample sizes and not even bothering with the home and away comps..... He averaged 25 vs. Australia, 30 vs England and 28 vs India. He did perform very well vs the WI and was known to give Lara and Sachin fits.
Any statistical analysis would be a disservice to Lindwall, and I have no desire to do so, and as brilliant as he was, he can no longer be seen as among the upper echelon of the top 5 / 6 of the game. And Trueman was with all respect was quite useless away from home.
This narrative that any of top dozen or so pacers are all basically the same don't bear or hold merit. The top 3 are quite apart from the rest, and I would be quite willing to demonstrate why, but believe everyone here knows that they had next to no holes and unmatched well rounded records while performing well vs the best batsmen and teams of their eras. Not to mention mastering a variety of skills they exploited better than anyone else, in all conditions. I personally believe the top two further separate themselves, but that's probably more subjective.