>> we need more fiction examples of positive AI superintelligence

Neal Asher did pretty well with his Polity universe. Besides AIs with some capacity for playful violence (Agent Cormac thread, but always there), we also get crablike aliens (the Prador war) and very weird biology (in particular the Spatterjay water world).

Tchaikovsky's "Children of Time" might qualify, if you look at it right.