On the Road is transcendent but Kerouac was by all accounts an S-tier prick. The Belgariad is delightful but David Eddings has some extremely unpleasant stories floating around.
ENDER’S GAME. It might have been great, except for the uhh … weird overtones. As it is, I still have to credit Card for the genuinely very useful maxim that the straightest route to defeating someone is to know them well enough to love them