Amazon Fire TV
My first Amazon Fire TV went crazy bonkers, wrestling to handshake with my telly to find a happy resolution and refresh rate. I had to send it back.
Amazon sent me a new one that was better but it still falls off the wagon sometimes. Out of the box it's 1080p/60Hz and my TV sometimes is happy to play ball, sometimes it's not.
In the settings you can choose all combinations of resolution and frame rate. Can't understand why the Chromecast won't. Since I bought a AFTV the Chromecast hasn't had a look in, in our house. Simple reason - remote control.