I would say that Dune is very character driven series.

Some other character driven science fiction that comes to mind is Bester’s The Demolished Man and The Stars My Destination, Heinlein’s Lazarus Long books ie Methuselah’s Children and Time Enough for Love as well as Stranger in a Strange Land, Stanislaw Lem’s Solaris and my favourite work of science fiction A Canticle for Leibovitz by Walter Miller Jr.