The names you mention on Joe Louis record, with all due respect, just do not compare. I am being very polite to them.
Joe Frazier had 9 defences and was a top 10 heavyweight on most people's list.
Getting knocked down by Two Ton Galento et al, outboxed by Conn showed his vulnerabilities. Just pointing them out and showing you Ali could have exploited them.
Just because you write FACT in capital letters does not mean he is.
Muhammid Ali is the best heavyweight ever, the quality and calibre of fighters he beat during a period regarded as the best in terms of quality, illustrates that.