If you haven't played them yet, when you get the chance I highly recommend the two Generations games. Sonic Generations improves on the formula for Unleashed in every way, and replaces the Werehog stages with Classic Sonic, who actually controls pretty well in that game.
Shadow Generations, meanwhile, has quickly stolen the spot as my favorite in the series. It's buttery smooth with tight controls, and a good story if that's your thing. I played it on my Switch 1, and it still ran like a dream. This is probably the most polished Sonic game I've played, besides Mania.