I know a friend who uses wind main, sage naruto, gaara the normal one tho kazekage would work, he just doesn't have him yet, and tsunade. Obviously this doesn't include many rare ninjas, and our server isn't as strong as yours is, but he can hold his own and is currently 9th in rankings. With the clones and dance of impetus his sage naruto usually gets in at least two rasen shurikens before he dies, even when he's focused down with people that are stronger than him. As for me, I'm an earth main, but i have jigokudo, so i'm using him, onoki, and yamato. I could use kazekage gaara if I wanted, but i figure having a castable barrier was better.

Yeah, jigokudo helps string my lineup together, what with the heal/debuff, the revive, and his double chase that works well with giant katsuyu. I got him really early though, and he's been in my lineup for like 30 or so lvls. I'm only a lvl 79, so that's rather impressive in and of itself. I can get ridiculous buffs out of yamato/onoki/earth main though, that's why I like it. Also good for gnw.