Elizabeth Bear writes some hard sci-fi through to fantasy.
New Amsterdam series: alternative universe where New York remained New Amsterdam, and the police are sorcerers with vampire support. Spans late 19th century to mid 20th.
The Edda of Burdens series: Norse mythology reimagined with some Dr Moreau, wolf who eats the world and reincarnation thrown in
The Iskryne series: more Norse-ish, with added Grendel, emotional/psychically linked wolves and warriors
Jacob’s Ladder series: generation starships and evolution and Wars of the Roses
Jenny Casey series: cyborg cops in near future Canada-ish
Eternal Sky series: strong themes from the Mongol Empire and Game of Thrones Dothraki, with some added sorcery and plenty of intrigue
The Lotus Kingdoms: Eternal Sky series adjacent, in the same world but later on, a bit further south and east flavoured
She writes more: the Promethean Age is one series which is full fantasy [Christopher Marlowe myth of being an Elizabethan spy with the twist of him being an agent for Queen of the Faeries at the same time, along with Shakespeare and his crew] and I have to be concentrating pretty hard to keep up with the prose