Okay! That's very similar to how I do stuff too! I also love extended harmonies as well. Thanks! : )
I also enjoy a lot of 20th century / 21st century composers. I think my main ones would be Charles Ives, Debussey, Prokofiev (as well! Especially his Romeo and Juliet opera. Love all of it!), John Adams, John Cage etc. I also love love love a lot of Japanese composers like Ryuichi Sakamoto, Yoko Kanno (Napple Tale is so peak if you've never heard that soundtrack.), and of course Joe Hisaishi.
I'll have to check out Ruth Gipps and Charles Koechlin though! Never heard of them actually...