i would suggest 5th hokage tsuande due to her entire team team heal which makes gnw scary also her critical chaos with her is more common then you would think. jiko pain is also good but lacks the debuff removel but has a very nice revive and healing when combine with clone. Sailor sakura is a good tank as well healer. ordinary sakura while good really relys on her mystery sadly

also thats not a mistype with team team i mean she heals everyone i note everyone but she a p2w ninja which i hate as a f2p, so your options if your not really lucky or like a f2p like me gnw sakura, kabuto, and if lucky jiko pain. Also water main she's good. Also don't forget there are other ways to heal ;)