The only thing I *might* have seen that you have not, and which is currently classed as a subspecies due to bugger-all research having been done on them though I suspect it will turn out to merit full specific status, is the Southern Aardwolf.
Well I've seen Aardwolf at Rare Species Conservation Centre, Cincinnati, Baltimore, and San Diego back in the day. I'm hoping one of those was Southern just to cover my bases haha...
Btw just got back from Costa Rica and I saw a new carnivore! The southern spotted skunk (Spilogale angustifrons)! I was in Montezuma trying to take pictures of bats flying at night when all the sudden it walked across the street maybe 10 feet from me. I was so shocked and focused on photographing the bats I wasn't able to adjust in time to get any photograph (plus in the dark my camera wasn't keen on focusing on a moving target). The whole thing only lasted a couple of seconds, and then I lost it in the bushes. I was heartbroken, as now it is the only mammal I've seen and not photographed. The next night I saw (and photographed) my first mouse opossum, so that pretty much made up for it
All in all I saw about 25 new mammal species, mostly bats!