Argentine water buffalo ~2000 lbs, (FA 9" .475 Linebaugh). Entre Rios province. Water buffalo were first imported to Argentina in the 1920's from the Indian subcontinent.
Australian water buffalo, also ~ 2000 lbs. taken in the N.T. (Arnhemland) with a 12 1/2" T/C .375 JDJ in 2000, the last buffalo to be legally handgunned in that country. Politicians changed the bureaucrats in charge, and they stopped issuing import permits for handgun hunting the following year.
Mature water buffalo bulls are typically ~ 200-500 lbs heavier than cape buffalo bulls.
Also took a Himalayan Yak in 1991 with a T/C 12" .45-70 Contender, but they are smaller than water buff also, perhaps 1800 lbs.
Several North American bison, large black bears, elk, hogs, etc. have been taken with FA .475 L's and .500 WE's.