Well I only know and love two Avant-Garde metal bands and they are Arcturus and Scald(a still-as-of-now little-known band from Northern Ireland), but let's keep anything Scald-related as a separate subject here as they have nothing to do with the likes of Arcturus. Right now I feel like being reccomended something that I may enjoy similarly as I enjoy Arcturus(I love both their LMI and TSM albums). The band that you may reccomend may or may not quite fall in the avant-garde metal category, but just so long as they may do as much for me as Arc, ok.