Fire is not the best. 10-hit combos are not the best. Elemental damage is the best and gets way more damage than your silly Tenten pulls off.
I'm a Lightning Main. We can buff our own by 40%, Sasuke adds another 40%, Gai/Iruka add another 30%. So we're sitting at 110% flat. But you know who gives the biggest buff of all? The bloody fox.
Kakashi deals lightning damage with his autoattack. He deals earth damage with his jutsu. The former hits for 8000 dmg while the latter I've seen hit for over 10,000. And he casts it twice per battle. Plus he has a clone to keep all four ninjas alive till the very end of the battle.
Sasuke deals, you guessed it, LIGHTNING damage with his autoattack. He also c*e his big jutsu if he feels like it but it only adds another 3000 dmg for the long animation. Your choice. Yet he makes up by having a 10-hit FIRE combo -- more elemental damage.
Gai might not exactly be elemental. But have you seem his Attack? HAVE YOU SEEN HIS DAMAGE?! He can achieve your 10-hit combos solo. He's almost on Kakashi's level, and he's really just there to buff the team until we get access to a certain swordsman that will leave him in the dust. Behold, Asuma the Wind Blade buffs all ninja at full health, and with Kakashi's clone your team will be full health for most of the battle, especially if Kyuubi roars. But the best part is he adds to your starting chakra, letting your main and Sasuke both trigger their jutsu, giving you two rotations of the same overpowered skill on your main. Did I forget to mention his jutsu is elemental Wind and crits insanely hard?!
Then your main... Lightning Armor allows you to attack three times. The Bloodthirsty demon skill lets you attack an additional time. And the last basic attack makes your attacks elemental with a mini combo that hits 2 to 4 times per swing. That's an average of 10 attacks BY YOURSELF that each hit for 2000 or more damage. I guess that means you're triggering your 5-hit or 10-hit combo Summon, huh?
Yeah, fire main is nice... for second place.