Manga

So basically everything with a long ass title comes from the long ass title LN era. The TLDR is it became difficult to hook people on your book so they'd buy it so authors/publishers/whoever decided to more or less put the entire plot summary as the title. A good example is That Time I Got Reincarnated As A Slime. Lot of these are actually quite old, from what I understand titles are less stupid nowadays.

Far as good isekai go Konosuba is definitely on the list, as well as the other 3 Quartet members (Re:Zero, Overlord, Tanya the Evil) plus Shield Hero though the story after the primary arc has so far been quite lackluster, also the season 2 adaptation is pretty crummy. I've also found The Eminence in Shadow very enjoyable, Cid is a very Ainz type stumbles into success type character which I quite like.

If I had to chose specifically a long ass title isekai it'd have to be Tensura (that slime one from earlier) which I liked enough to read um everything. I've read the LNs, WN, Manga, Diaries spinoff, Clayman spinoff, Rabbit spinoff, and the Trinity spinoff. You could say I enjoy it quite a bit. The core of Tensura is not a battle anime but more along the lines of a city builder. You get to watch Rimuru slowly build a city, run into silly isekai problems and have fun isekai fights but really truly Tensura is about yapping. That's not to say there aren't good fights (though 8bit has kind of been slacking off when it comes to adapting them so far...) it's just don't go into it expecting your typical battle Shonen type shit. They fight sometimes but frankly speaking Fuse the author isn't very good at writing fight scenes. It gets especially bad once the power scaling gets a bit out of hand where it's pretty much just "Oh you've resisted my instant death move, that's a shame I'll have to use my instant death move V2 then haha!" "Impossible! How did you defend against my instant death move V2??" "Hmm yes it's a shame, but, I have an immunity to death, you can only kill me with battle will..." and then they sword fight or whatever for awhile and one of them wins because they have more existence points. Being a bit dramatic but they get extremely samey after should be season 5? if we get that far

Edit: oop. I thought I was on the anime thread I guess. Scrolled down a bit and saw what appeared to be a copy of this same post which is when I noticed, oh well. I've read at the very least the Manga for everything I talked about lol