Not technically an isekai but .hack//sign is great and basically about being trapped in a video game so it's similar.
Visions of Escaflowne is an isekai without the tropes, it's from the 90's and includes some mechas.
So I'm a Spider, So What? is good and I don't remember fan service or anything else being an issue.
I still enjoy Inuyasha and think it'd be worth you checking out if you haven't yet.
Ya Boy Kongming! is great, it's about a historic figure getting reincarnated in the modern world.
My Next Life as a Villainess, it's cheesy but I like it, villainess isekai has been gaining some steam in the last couple years.
Sonny Boy is amazing and definitely not your typical isekai.
Some favourite non-isekai but still worth checking out:
Jujutsu Kaisen
Fruits Basket 2019
Summer Time Rendering
Horimiya
Attack on Titan
Chainsaw Man
Kaguya-Sama: Love Is War
I only upgrade my phone if my current one stops working, though I'm poor right now and my current phone is giving me some issues so I just kind of have to deal with it at this point haha.