For me, the best rhino villager would have to be Merengue. Not only does she have an adorable color scheme, but I love her dessert theme. Her strawberry and cream horns are very cute. She also has the normal personality type, which is one of my favorites. Honorable mention to Azalea, who has a cute theme of her own with the flower theme.
For least favorite, I'd probably go with Renée. I'm not a big fan of her facial expression; she looks kind of mean to me.
My favorite rhinos are hornsby and Spike. Spike reminds me of a member who is no longer active here since he always had spike in his avatar ; I also like his design and gruffness (same as I do with orher crankies I like ). I never had hornsby but would love to have him on my island; I think his design is really cute.