I am not disputing that Natsu would not surpass everyone however I don't think that he has surpassed them by a great deal just yet. Gray and Natsu are supposed to battle again and even Gajeel is still his rival and I don't see Jellal and Laxus losing to him without Natsu going all out. Then we have Erza who is also a strong main character. Therefore I think it's safe to assume that if current Natsu could defeat Bluenote this easily then these guys would have also been able to beat him. This would mean that FT's strongest members are above Gildarts from 8 years ago and Bluenote. Current Gildarts might still be above. (This is excluding Natsu going all out, friendship powerups etc.). I just think that this is an indicator of how strong some of the other characters would have gotten by this time as well. I'm not hating on natsu or hyping other characters.