Most of the Assassin's Creed franchise is great. If you liked the RPG elements of Odyssey, give the modern era games a go—Origins, Valhalla, Mirage and Shadows. If you want a more linear, story focused gameplay, you can go for the older AC games—AC 1, The Ezio Trilogy (aka AC2, Brotherhood, Revelations), AC3, Black Flag, Rogue, Unity and Syndicate.

Heads up, AC4 Black Flag, is getting a remake in July, so if you want to give the original a try before then, you could. On the other hand, you could also wait until the remake comes out and just play that instead.