Occasion s when ATG s have been champion s at the same time in same division?

Duran, Leonard, and Hearns overlapped as welterweight champions before the titles were unified.

 

The 80's were awesome. Sanchez and Pedroza for sure. Hearns and Duran at 154. Spinks, EMM, Saad and Braxton would have overlapped in various ways. It's up to the individual whether he considers any of the latter 3 to be approaching an ATG. The 3 certainly weren't a million miles off it tho you can argue none were. Chandler and Pintor scrape in for mine.

 

Like JohnThomas said, it is your own criteria on who you consider an ATG. Offhand I can think of Victor Galindez-John Conteh, Roberto Duran-Esteban DeJesus, Roberto Duran-Rodolfo Gonzalez, Carlos Monzon-Rodrigo Valdez, Carlos Zarate-Alfonso Zamora, Venice Borkorsor-Masao Ohba to name a few. Some of these matches were made and some rotted on the vine. Some, like Zarate-Zamora happened without unification blessing. I can also think of the Freddie Steele-Fred Apostoli rematch taking place the same way where the participants came in heavy for whatever reason with no title at stake despite both holding laurels. But again, some of these are of a fine line where some may not consider them ATG and some do.

 

Recently, Mayweather Pacquiao. Tyson & Spinks too if it counts him being an ATG LHW

 

For a time in the 80s, there was a feeling that Azumah Nelson and Barry McGuigan at featherweight might develop into a classic rivalry but while Nelson is now regarded as been arguably an ATG by many and one of the finest fighters ever to come out of Africa, McGuigan never really came close to fulfilling the great promise that he had shown leading up to his title win.

 

What about 90s welterweights? At any one time in the mid 90s you might have had Tito, Quartey, Sweet Pea, Oscar. Awesome array of talent spread over three belts.

 

Absolutely. While Barry fell short Nelson is a certified ATG for me, easily.

 

The Klitschkos, and technically both of them had WBO belt at different times while Lewis had the major ones. Foreman, Holyfield, Tyson Bowe and Lewis all held titles in the 90s and most of them overlapped at one time or another

 

Ruben Olivares and Bobby Chacon (today overlooked) were around at the same. Numerous good/great fighters out in that LA area in the 60's & early 70's.