The Roland HS-60 is a great Juno alternative. It’s literally a 106, but with an uglier paint job and, inexplicably, speakers. They can usually be found for much cheaper than most Junos, though this is changing now that the “secret is out.”
The Casio CZ series is pretty funky. I own a CZ-5000, and playing around with its weird phase distortion synthesis (like FM, but not) is super fun. I find it’s best for super warm pads – this being one of the best examples I’ve heard.
Beyond that, the Akai AX60 is an interesting, lesser-known poly.
My favorite is probably a toss-up between the Juno 60, Prophet 5, and Korg Polysix. Mmmmm.