I started a retrospective of British composers pre- and post-Elgar and Vaughan Williams.
First up: Sir Alexander Mackenzie. Nice but not outstanding. I recommend sampling the Violin Concerto and Pibroch Suite.
Currently: Hubert Parry. So far I'm through Symphonies 1 and 2. Parry has real orchestral chops. I can't understand why he is not more popular and most often played. I guess he's known mainly as a choral composer, but that does him a considerable disservice.