[2020] Who should i get?

I feel you can't go wrong with either. Mozzie is a great roamer who can gain access to Attacker drones, which can set you up for some great intel and potential for game changing flanks.

Goyo is great Anchor/Area Denial. You can place his Volcan Shields in places that Attackers normally push through and either force them to take a different route, or counter-cook an unexpecting Capitao. Plus, you can set up some pretty cool lines of sight on your Volcan Shields as well if you blow a hole above or below the shield.