My personal favorites are Paper Mache Dream Balloon and Float Along - Fill Your Lungs, but it depends on your personal taste. I'd head here though and post your question: All Things King Gizzard & The Lizard Wizard
Problem is, there is a lot of variation and many people like them for different reasons. My favorites are the following and I would recommend sampling some of each at least if the first don't grab you.
Mind Fuzz
Nonagon
Microtonal Banana
Polygondwanaland
If you think thrash is accessible go for Rat's Nest
I tried listening to an album or two back when they dropped like 5 albums in a year and it didn’t do it for me. I like going back and trying things again because maybe I wasn’t in the right place at that time.
I like to give things a few different tries at different times in my life. I like just about all kinds of music so the diversity thing definitely intrigued me about them. Heard the song fishing for fishies today and made me want to check them out again.