Murderbot and Imperial Radch are pretty solidly Space Opera (as is Peter F. Hamilton) – Hard SF is typically characterized by complete focus on the worldbuilding and little to no feelings. Poul Anderson's Tau Zero is perhaps the ur-example, though very noticeably a product of its time re: sexism. Stephen Baxter writes some decent Hard SF that I read recently (which prompted my sadface about the terribad romance and the infodump I already knew everything about). Other authors I'd name would be Alastair Reynolds and Greg Egan, who're generally good with female characters.

The three big subgenres I'm into are Hard SF, MilSF, and Space Opera; they're generally concerned with feelings other than romance-related ones. (For Hard SF, curiosity and the sense of wonder; for MilSF, loyalty and determination and sacrifice; for Space Opera, loyalty and larger than life things and here romance might exist but I prefer the epic spy plots.) There's a good chunk of romance with science fiction, but it seems to approach it from the romance end and thus write the tropiest crappiest science fiction backdrop for the romance, and I'm also just ... utterly done with heterosexual romances. Give me MilSF where the good Captain is a lesbian! Write space opera where there's a planet where sexes are segregated and same-sex attraction is normal and there's no "heterosexuality conquers all" plot! Argh.