What are the 10 most important MOSs in the Army?

"Let us be clear about three facts: First, all battles and all wars are won, in the end, by the infantryman. Secondly, the infantryman always bears the brunt; his casualties are heavier, he suffers greater extremes of discomfort and fatigue than the other [combat] arms. Thirdly, the art of the infantryman is less stereotyped, and far harder to acquire in modern war, than that of any other arm." — Field Marshal Earl Wavell

Whoever's got the keys to the Arms Room

I couldn't have done my job without 11b 13d ada forward observers air support radar or anyone else every mos is important

Well, it depends on the mission. ....

Major combat operations are different than humanitarian assistance / disaster relief (HA/DR), and both are different from COIN.

I agree with the prior comments that the army is a team of teams. However, in combat, the killers are on top, but on HA/DR, they are not very helpful to people who need clean water, power, shelter, and debris removal.

But since the question was pretty specific, I will just us combat as mission for my list.
My list for Decisive Action/Major Combat:
1. Infantry (all MOS)
2. Armor
3. Cavalry
4. Artillery
5. Intelligence spt (including UAV)
6. Logistics (in order, 92F, 91B, 91M, 92A, 91A, 91P, 88M, 92G - not leaving off people, but many of these MOS can serve/cover other roles)
7. Medical (PA, Dr., RN, 68W, P-Med, lab tech)
8. Signal (25U)
9. Engineers (12B, 12C, construction MOS)
10. EWO (if fighting a near peer)

88 mike. The spear head of logistics, nothing moves until we move.

You can not hold territory without infantry that has never changed through out history.

Artillery will always be King of Battle! Then you have the MLRS who are the GODS of WAR!! You cant move if you cant suppress stop and neutralize the enemies artillery. There is a reason even Patton loved the Artillery. Then you have the Combat Engineer who clears the way for Infantry the Queen of Battle all else follows from there.

Ok let's take a look at this picture. Artillery is the king of battle; however, what you gonna do when that gun goes down? You always need repairmen. They are like equipment medics. And while we ALL can learn the next man's job with time, in combat TIME is essenssial to our troops livelihood. You want that repairman that knows his stuff to be forward with you and get that Howitzer up in the least amount of time possible!

Firstly, Infantry is the Queen of Battle. Secondly, while ALL jobs feed the fight, the battle is not considered won until Infantrymen occupy the objective. Sorry if I bruised some support element egos.

"One band, one sound."
-Drumline