I'd argue boaster ranks above valyn. My man got 3 titles for his team while valyn is still on his fluke run
It depends if you're talking of all time and how you measure the value of IGL. Valyn's yet to prove himself with titles and trophies and boaster has had much more success in the long run so in the conversation of all time he is definitely on top. However, Valyn also provides additional value to G2 with his fragging which makes him more valuable as a player, while boaster provides his value soley through IGling (I know boaster did frag well his last game but that's much more recency bias if you look at his season)