well really depends on what u can play comforably, my first 6* fc was beatmapsets/983911#osu/2168768 , for me this was the easiest 6* fc. and i suggest not going for padoru fc, its not worth it.
i just added your guys suggestion to https://osekai.net/medals/index?medal=Anguish%20Quelled you can add maps and upvote there btw after logging in ---stealth advert (for the ones in this topic i didn't add: didn't know what difficulties were meant)