You might like Sins of a Solar Empire. The scale is even larger than SupCom, so a full game can run several hours to complete. You can play on smaller maps as w

You might like Sins of a Solar Empire. The scale is even larger than SupCom, so a full game can run several hours to complete. You can play on smaller maps as well, but the game shines best with several different solar systems. It's got large fleets, a decent amount of automation (very little micro needed as I recall), a huge range of scale in terms of the units themselves, strategic zoom every bit as good as SC. Layer on top of that a research tree, neutral factions (pirates) you can influence, 'hero' units in the form of capital ships that you can level up and customize. I haven't played since the very first release, so maybe it's gotten overcomplicated since then - but I think it's worth a look