I found this amazing seed that provides literaly everything you need.



here is the seed:

-2126057963



you start in this little island but you can find really big islands including a mushroom one, a really big mooshroom island.


Mooshroom island coordinates:

X: 322.814

Y: 106.277475

Z: 306.475

Block: 319 82 323



Right infront of you when you spawn, you shold have a guardian temple. The island is surrounded by icebergs and if you go south you can find ice biomes

It also has alot of cave raveens