All of Asimov, Philip K Dick, Jules Verne.
For an entrance into Asimov and his incredible Sci-Fi voice, check out “I, Robot” and the Robot detective series. He was really the originator of the term and popular idea “robot” and “robotics.” He would eventually turn to writing popular science to mixed results.
(Read ~12 tomes of Strugatskies and perhaps a dozen titles by Asimov)
After I grew up, I picked up the Robot Series and Foundation Series. I didn't find any fictional work of his to be uninteresting. So, perhaps this comes down to individual preferences.