If you feel the need for a protector, I've had good luck with the amFilm full screen for the S7 from Amazon. I tried several regular TG protectors and they lifted or had halo issues. This one adheres on the top, bottom, and sides. And I use it with an Otterbox Defender with the plastic screen removed. My job requires me to move around in tight quarters of a warehouse so I need this level of protection.
Your need is dependent on how much risk you believe your phone is in to damage.