I'd add trudi canavans books placed in kyralia to the list.
LeGuin's Earthsea too.
Regarding your "older stuff's no good" opinion (which I won't discuss here - too much a topic derail) I disrecommend reading Discworld books.
This not because I classify them as "older"; by ignoring the classics of the genre as you do, you simply lack (or at least have huge gaps in) the common frame of reference. You'd miss so much gags, references and allusions that you might end up asking yourself why people think those books are funny at all.
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