Here's a pretty underrated work I enjoy:
JETX is like if you took the late Archie Mega Man comics and sprinkled a little bit of Sonic and Dragon Ball. It's cool! And the creator who makes it is a pretty chill guy.
I also really like this series too and find it pretty underrated:
This dude dedicates his entire artwork to the 1930s aesthetic, especially some of its knittier-grittier aspects. Even going as far as to make it all hand-drawn traditionally! The fact that its here is astounding, and I thought I was the only one dedicated to a very cartoonish style on this website.