this is a one on one fight excluding kiba and akamaru natsu is at full power (base natsu) no nakama stuff he is fully restored for each fight. everyone's goes full power.
Only Sakura and maybe Choji win IMO. Why is Choji being underrated? He has more raw power than any of the Konoba 11 outside Naruto and Sasuke who are not present. There was even a panel of him crushing Edo Kakuzu and Neji's father. Also Shikamaru IMO can't beat Natsu without prep.
How can Sakura beat Natsu apart from the very abvious strength difference? Or is that the reason why you think Sakura wins?