Here are some heat NatDex OU teams I've used with sucess on high ladder.
https://pokepast.es/a02da3f74a8d47cf - The God Metagross Team
https://pokepast.es/5cc13a3d65175efd - Rockium-Z Hippo Sand
https://pokepast.es/58ffa768b1e1b83f - Specs Magearna
They're all fire, but don't sleep on the GOAT, Alomola, it always pulls it's weight.
https://pokepast.es/a02da3f74a8d47cf - The God Metagross Team
https://pokepast.es/5cc13a3d65175efd - Rockium-Z Hippo Sand
https://pokepast.es/58ffa768b1e1b83f - Specs Magearna
They're all fire, but don't sleep on the GOAT, Alomola, it always pulls it's weight.