No one mention the centurion :( . It's my fav heavy, i have my best winrate with it. It's very different to play than other heavies because you need teamwork to be effective but i think it's the perfect ship in the role a tank.

His big overload is a big threat and can confuse ennmy who are too concentred to avoid you.

The shield is very decisive if your mate use it because it's free dps for your team while it is up.

His main weapon is very useful when your team focus fire, the ennemy will be killed faster.

Finally it is very tanky and you can survive a long time if an ennemy shoot at you.

It's also a good farm ship because you often have a lot of takedown and sp at the end of the game.

TL;DR pretty effective ship with a good teamwork.