I am sure others might chime in with suggestions of their own, but based on your comments here are a couple ideas of mine:

• Ghost in the Shell: Stand Alone Complex - If you haven't already seen it, give it a shot. Essentially about cyborg police fighting crime set in a technological future.
• Planetes - This is a more realistic, near-future sci-fi in which our main cast of characters live on a space station and are tasked with removing orbital debris.
• Kino's Journey (either adaptation, though I would probably recommend The Beautiful World from 2017) - This is a bit different as it is an anthology story. So, each episode is usually a self-contained story featuring the titular Kino and their talking, sentient motorcycle Hermes. There are lots of chewy moral dilemmas and morally gray characters for your brain to engage with in this show.
• Cowboy Bebop - I mean, this one is a classic. From the killer soundtrack to the stylish animation, you can't go wrong with a bit of space bounty hunting. This is essentially the show that Firefly was trying to emulate.