Lets just use this season. fantasy: Elf bride, (kinda maybe Sci-fi fantasy mix, its... Something at least and interesting for shure) train to the end of the world, (also kinda chilling in another world with lv2 but that's more of a stretch, guy got from one fantasy world to another), 7th Prince (same world reincarnation isn't isekai), Spice and Wolf, the banished former hero, unnamed memory, (maybe, cause idk if it counts as fantasy or Sci-fi) date a life, delicious in Dungeon, The Irregular at Magic High School (Sci-fi but with magic so i would count it as fantasy), The Misfit of Demon King Academy (same world reincarnation).
Maybe there are some more but i don't have those on my list. And i would say there are some great fantasy that are also isekai, jobless reincarnation is definitely great and the isekai part isn't stupid. Re:Monster, the new Gate are also good and there are some more.
I don't like the isekai hate, they are popular for a reason and as long as they are made good (like in not written like shit) they are also good fantasy. Like when Fern for example would be a reincarnation or traveler, would that change how good the story is would that change much?