For those searching for agencies that specialize in fantasy and historical fiction, you might take a look at Dinsdale Imber. They do accept and encourage submissions from new authors.
Dinsdale Imber is a dedicated independent literary agency, specializing in the best of genre writing: historical fiction, thrillers, fantasy, science-fiction and horror.
It works in association with AM Heath & Co Ltd, one of the world’s leading literary agencies.
Dinsdale Imber’s clients are represented by Robert Dinsdale, formerly of AM Heath and the HHB Agency, and supported through all stages of the editorial process by the agency’s editor, Kirstie Imber.
Hope this helps.