Can ye recommend any novels / authors that are as hard sci-fi as KSR or Arthur C Clarke?
I strongly recommend Greg Bear. His first novel "Blood Music" is a unique take on an AI out of control, and he continues with a series independent of novels which all take place in a unified "future history". One of my favorite aspects of his future history is the combination of the bio-genetic, cosmetic surgery, and pop media artist industries to create transhumanist pop media artists, and spawning a transhumanist y…
When I started reading grown-up SF decades ago it was with Bear, Bova, Niven, Pournelle, and the like. Back then Eon, Blood Music, and Ringworld (for example) were mind-blowingly vast concepts.
As an aside (and purely because it's probably my turn for some hefty downvotes) I'd definitely agree with the comment elsewhere in this thread about the Foundation books being overrated. Almost unreadably dull and feeling more like any concept of 'plot' is just a carrier for a couple of mediocre ideas.