You could try “The Murderbot Diaries”. Never read the series, heard it’s pretty good. There are seven books in total. Plus the series is being adapted by Apple TV and it’s starring Alexander Skarsgard
If you don't mind fantasy instead of Sci-Fi, The Magicians is similar in that you get to really care about the central and supporting characters. There's some dumb stuff in the series, but I binged that about as hard as I binged The Expanse.
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Or if you like Fantasy
Stormlight Archive is so good.
The Malazan Book of the Fallen by Steven Erikson
The Black Company by Glen Cook
The Sun Sword Series by Michelle West
Hyperion Series by Dan Simmons
Dune Series by Frank Herbert
Foundation Series by Isaac Asimov