Ernest John Moeran (1894 - 1950) was an English composer who had strong associations with Ireland. In my opinion he may be the most underrated composer of all time (his AllMusic page is limited to his name). His small repertoire is exquisite, featuring a fabulous symphony and one of the best violin concertos of the 20th century. His best work is for me his cello concerto from 1945, the most beautiful concerto for this instrument of all time, even outshining Dvorak, Elgar and Finzi. Relevant links below.