getting it stock no brand is possible but you will void your warranty, because samsung does not want users to flash software themselves and if the phone breaks and you bring it to a repair shop if they cross the imei number and look at the software you are using they discover that you have unbranded a branded device and will negate your warranty even if the problem was not flash related.
Also keep in mind that in the recent years completely unbranding a device without rooting is nearly impossible so you will then need to root however rooting causes Knox chip to trip to protect the data it contains and this will mean that not only in dowload mode there will be a script saying warranty void 0x1 meaning you killed knox chip (and this is easy to look for without even checking the imei and software correspondance=probably every assistant center will notice that and negate warranty repairs) but you will also be unable to use all the services which use the knox chip since it fused itself and you need to know when rooting at least what stuff you are touching and which unofficial rom you are installing in order not to get malware or stuff like that or even permanently brick your device.
With ADB commands instead you will be able to disable all the bloatware from the carrier and samsung you want to disable and it will never launch itself in the background ect... and it will be like it was not there.
Just take my advice, go on xda and use the guide to learn the disable command and use it...
Archer
