Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita
I've Been Killing Slimes for 300 Years and Maxed Out My Level
Is very similar to this show.
Similarities:
Powerful people wanting peaceful lives.
Homely feeling and helping people around
Protecting people trying not to be OP
Stories are very different though but the protagonists can be similar
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Recommended by cheyaposha