If you take the comics into account, it's going to happen A LOT! There's this ridiculous amount of canon characters that are exclusive to other media and specially the comics. The Archie run had a disproportionate amount (and then it didn't, but that's a rabbit hole called Ken Penders) and the current IDW comic series has about a dozen and most of them very beloved.

If you want to have a fun time look for 'Scourge the hedgehog', then search for 'Knuckles genealogy tree' and know those are all canon.

Also, yeah, those are both canon characters! Their name are Tangle (lemur) and Whisper (wolf)