A good way to identify authors that you like is to pick up an anthology. Here, you'll get a introduction to numerous works from each author (short stories, sometimes poetry), so you can decide for yourself, what good fantasy literature looks like. You can also let the awards be your guide. Authors and works that have won the Locus, Nebula, Hugo, or World Fantasy Award will be extremely high quality.
Good luck, and have fun. Don't be afraid to go off on a tangent with your research. Some of the best ideas are formed that way.
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