The coolest shaders in Minecraft?

I can echo the recommendations for SEUS. In addition, they have an experimental path tracing shader (not RTX ray tracing, so not taking advantage of RTX cards) which is also uncanny. I particularly like how the PTGI one handles glass and other transparent materials.

it depends on what preferences you have. Realistic / cartoonish. Realism include ZEVS ultra shaderspack.

but if you just want to cheat on Minecraft than get the "see block" shader its basically Xray but you can't configure it and it makes you see only ores nothing else so be careful around lava.

I used Sonic Shaders. But tbh if you aint got a good pc i dont suggest using them because they kill frames

Sonic shaders, seus its really good looking, but yea it can tank your fps depending on your computer.