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A Google search for "musketeer turtle" turned up Touché Turtle, from which I found a variety show called "Yogi's Gang" that features shorts with lots of other HB characters. Sounds like the other two are Wally Gator and Peter Potamus.
Hell yeah! Those are the right 3!
Yeah, Jason Kreis ain't exactly a soccer star.
I grew up with Yogi the Bear, and definitely remember Touche Turtle! He had a big plumed hat and a sword belt. Oddly, I don't recall the alligator or hippo at all.
I saw some 60s cartoons. One was about a crocodile running out of a zoo. Another had a hippo in a hot air balloon. The last one had a musketeer tortoise.