Here are some ideas for mythical Pokemon. I imagine you'd be able to get one of these in a post game event pertaining to the E4, depending on which element you match best.
Blazzitan
Typing:
/
Stats: 70 / 90 / 80 / 125 / 110 / 105 (BST: 580)
Ability: Pressure
Based on Mesoamerican / African dragons
Messydra
Typing:
/
Stats: 105 / 80 / 90 / 110 / 125 / 70 (BST: 580)
Ability: Pressure
Based on Greek dragons
Skyfoon
Typing:
/
Stats: 70 / 125 / 110 / 90 / 80 / 105 (BST: 580)
Ability: Pressure
Based on Chinese dragons
Smaraggon
Typing:
/
Stats: 105 / 110 / 125 / 80 / 90 / 70 (BST: 580)
Ability: Pressure
Based on European dragons
Blazzitan
Typing:
Stats: 70 / 90 / 80 / 125 / 110 / 105 (BST: 580)
Ability: Pressure
Based on Mesoamerican / African dragons
Messydra
Typing:
Stats: 105 / 80 / 90 / 110 / 125 / 70 (BST: 580)
Ability: Pressure
Based on Greek dragons
Skyfoon
Typing:
Stats: 70 / 125 / 110 / 90 / 80 / 105 (BST: 580)
Ability: Pressure
Based on Chinese dragons
Smaraggon
Typing:
Stats: 105 / 110 / 125 / 80 / 90 / 70 (BST: 580)
Ability: Pressure
Based on European dragons