not specifically thinking in "avant guard" terms just some good stuff that i like.darek bailey - improvisation 1975solo guitarhttps://youtu.be/mfMVQ-DvAB8tony oxley - ichnosw/evan parker, barry guy, evan parker, kenny wheeler and paul rutherfordhttps://youtu.be/4JEp_UUwq7Efieldwork - live at le poisson rouge, nyc 2008vijay iyer, steve lehman, tyshawn soreyhttps://youtu.be/mlw24oWkgMo