Entei is the number one sleeper pick, true heat. 50% burn chance on Sacred Fire gets burns all over the place, teamed it with Toxic Bro to spread status and Hex Spectrier cleans up real well once status is spread around a little bit. Not sure if this team is really that good, but it's heaps of fun to use.
https://pokepast.es/eaca1f3c3a942e51