search for CleanROM 2.5 for HTC One. It has a list of all the things it has disabled. It is on the 'extreme' side of disabling apps for max battery life.
If you wish NOT to root, compare CleanROM's list to the apps you see on your phone and disable them.
But you will not have the control you want over the installed apps until you root! Here is where I am currently:
Unlocked, rooted, s-off, and cwm 6.0.3.3
Tried RageOne rom and CleanROM, but currently running OMJ 1.7 rom for max battery savings.
I have frozen many apps with Titanium Backup, such as Facebook for HTC.
I have installed Greenify to auto-hibernate apps <--- works great!
Powersave turned on for CPU only
JuiceDefender for Airplane mode during night time.
Even without using Airplane mode, for the past two nights I was able to draw 2% battery usage overnight! I used to see 5% battery loss or more overnight.
I'm not a person who wanted to do all of this to my phone, but the poor battery life drove me into an obsession of getting a more acceptable battery life. I'm really disturbed at how much bloatware is installed. I looked at a friends Note 2 and his list of "Android System" apps was longer than my HTC One!!