same old same old

like almost all mangas?

here are examples of good isekai:

moon-led journey across another world
tensei shitara slime datta ken
shiro no koukoku monogatari
wanwan monogatari kanemochi no inu ni shite to wa itta ga fenir ni shiro to wa ittene
botsuraku youtei nanode kajishounin wo mezasu
the white cat that swore vengance was just lazing on the dragon kings lap
jishou akuyaku reijou na konyakusha no kansatsu kiroku

already read these , i get what you mean about "same old plot" but there are a tons of mangas(isekai) out there really, good if you want recommendations just ask

Moonled journey also has a wimpy mc though. One who just goes with the flow while important stuff just kinda happens to him.

Some that I would recommend:
-Moto Sekai Ichi'i Subchara Ikusei Nikki: Hai Player, Isekai wo Kouryakuchuu!
-Maken No Daydreamer
-Saving 80,000 Gold Coins in the Different World for My Old Age (slow start, but becomes better later on)
-Potion Tanomi de Ikinobimasu! (same author as previous, and plot with some similarities.)
-Sekai Saikyou no Assassin, isekai kizoku ni tensei suru
-Kujibiki Tokushou Musou Harem-ken
-The New Gate
-Kage no Jitsuryokusha ni Naritakute
-The beginning after the end