Asimov's peers during the formative years/decades of science fiction (the 'Golden Age' of SF) are all worth reading: A E Van Vogt, Robert Heinlein, James Schmitz, Murray Leinster, Jack Williamson, and
many more. Arthur C Clarke - of similar gargantuan SF stature - was Asimov's pal; their friendly barbs at each other are hilarious.
Each writer has a unique style and outlook, and they're all worth reading. You'll find many unforgettable stories (such as 'The Humanoids', by Jack Williamson). Indeed, writers like James Schmitz were so far ahead of their time that they're still awaiting re-discovery.