The strongest job is apparently not a hero or a sage, but an appraiser (provisional)!

最強の職業は勇者でも賢者でもなく鑑定士（仮）らしいですよ？

by Atsushi Takeda, Atekichi

Hibiki, a high school student who was suddenly transferred to another world, wanders alone in a vast grassland of a fantasy world where monsters inhabit. All he has are non-combat skills such as "Appraisal"! From a hopeless situation, he is saved by encounters, and his all-powerful abilities blossom! An another world adventure tale of miraculous reversal cheats burst forth! (Source: Alpha Manga)