I read a lot of fantasy too, if I had to pick a favorite writer it might be Ian McDonald, but Mike Carey is so good, the comics he worked on are so good.
To push it a bit more contemporary: Peter Cawdron and his "First Contact " series, which is infinite variations (about 30 as of now) of making first contact with an alien sentience of any type.
It's excellent, and despite being excellent only available on kindle / kindle unlimited because as an independent author, that's the only way for him to publish & make a buck out if it.
I'm getting into Adrian Tchaikovsky myself. He certainly loves painting the future as a capitalist hellscape, doesn't he?
I'm part way into Shroud, where whole solar systems are being strip-mined for resources, and the people doing the work are skinny because they can't afford to eat well but they get auto-dosed with drugs to help them focus when hunger is distracting them.
Not a purely sci-fi author , but checkout "Octavia E Butler". She uses sci-fi to explore other thematics. The fact that I didn't see her name once here says a lot about how underrated she is
Her main book "parable of the sower" is a must read today for anyone living in the USA nowadays. So many points of today's politics make me think back about that book.
Asimov, Clarke and Frank Herbert are, of course, in the top 3, but I particularly enjoy Dan Simmons as well. I loved both Hyperion and Ilium, he has a knack for weaving together half a dozen tales that have seemingly nothing in common. Downside is that you spend an entire book reading the buildup to the actual story, but I'm a Robert Jordan fan too, I'm accustomed to that.