DISCLAIMER: I take no responsibility if you brake your phone, or find your balls after debloating the $#it out of your Galaxy S5.
Safe to Freeze:
AT&T Hot Spots
AT&T Software Update
KNOX Notification Manager
My Files (ONLY if you have a third party file manager)
Samsung Push Service
Apps to delete
Use with caution, if you don't know it is safer to freeze.
AT&T Digital Locker
AT&T Mobile Recovery
com.cequint.ccid (This is the ID caller app. can't remember the actual name)
AT&T Drive Mode
imsqmisocket (Can't remember the actual name)
Hopes this helps. If it did hit "thanks"