I wonder who the weakest wc is considered, Steinitz maybe?
Hard question, but probably Max Euwe, although Max Euwe was a sensational player nonetheless. Or maybe one of the FIDE WCC like Alexander Khalifman.
Steinitz is underestimated, he won every match he played for 32 years, scored 7-0 without a single draw in a match against Blackburne at a time when the latter was World #2 according to Chessmetrics, won 25 games in a row against top opposition, etc. Not to forget that he won four title matches and played the strongest opponents, unlike for example Lasker and Alekhine.
stupid category. i'd say some of the "FIDE WCHs" are the weakest, but still a stupid category. "weak World Champion"
Topalov was the only one of the FIDE WCCs that was actually good enough to be champion, the rest aren't.
Pretty much.
That was kinda Dark, unstable and tumultuous Age of chess🤓