I've enjoyed both stories and while I am enjoying Shield Hero's anime adaption I couldn't stand the anime adaption for goblin slayer. So I'll be referring to the manga for that series.
Now lets get the word that rhymes with grape first. For shield hero it was used as a false accusation for two major points, to show how far the female antogonist will go to get her way and manipulate the people around her and secondly to make the main character hated by the people of the world. As for goblin slayer it was used to show how cruel and Savage the gobbling can be, present just how disgusting those mobs can be.
Both series are very different genre so both may not be in your taste, but both share the same idea that I highly enjoy, seeing characters grow from their traumatic experience and open up to people again.
In goblin slayer you have the main character who after a traumatic moment afte goblins massacre his village he grown up to become a man who thinks nothing but how to kill goblins. He has zero experience interacting with other humans/elfs etc. And during the course of the series he starts enjoying life more.
As for shield hero you have a naive guy who came into a world thinking he might be a hero, only to be given the short straw and have his entire reputation ruined. He was forced to commit actions that would be consider hideous just to survive. During the series you see him regained his self worth again while also gaining the trust of those people who believe the lies about him.
Between the two goblin slayer is the most graphic, so if the subject of rape doesn't bother you that much and enjoy realistic planning and strategy in a fantasy setting I recommend the manga of gobbling slayer. As for shield hero if you enjoy fantasy worlds and a character rising against all obstacles, you can try to watch shield hero.