I don't personally run earth main very often but I've seen some seriously cancer builds like this

x x x
tsunade kakuzu main
x kurenai x

I've seen Iruka in place of Kakuzu but that leave you without a real heavy hitter, but makes your shield game just that much stronger. And of course Gakido could go in place of Kurenai if obtainable. Also Yamato would be a game changer if you could get a hold of him