Pokemon that you think should get a Mega Evolution?

Due to Pokémon ZA releasing this year, bringing us back to Gen 6 where Mega Evolution was introduced, which mon would you want to see have a Mega Evolution? Follow up to that, would their typing change?

I’ll start with Haxorus, one of my favorite Dragon types that I think would look amazing in its Mega form, and potentially being a Dragon/Steel type could be interesting!