I was going to say Ursula Le Guin but someone beat me to it lol.
So instead: I haven't read all of her books yet, but I've really liked everything by Emily St. John Mandel that I've read so far. Station Eleven was great (and the TV series is even better somehow!) and Sea of Tranquility was super interesting.
I really like Homage To Catalonia, it might actually be my favourite Orwell book.
Also most Bill Bryson books. I read One Summer, America, 1927 recently and really enjoyed it, but A Short History Of Nearly Everything and At Home were also highlights.