Hey, I like to post some of Fairy Tail's most powerful characters in the Alvarez Empire Arc around Chapter 490. Here is a list of the top 35 right now:
Top 35 List
01. "Black Dragon King" Acnologia
02. "Emperor Spriggan" Zeref Dragneel
03. "Scarlet Dispair" Irene Belserion
04. "Magic King" August
05. "Salamander" Natsu Dragneel (X792/Fire Dragon King Mode)
06. "Hybrid Theory" God Serena
07. "Thunder God" Laxus Dreyar (X792)
08. "Ace of Fairy Tail" Gildarts Clive
09. "Heavenly" Jellal Fernandes (X792)
10. "Grim Reaper" Bradman
11. "The Adjudicator" Wahl Icht
12. "Valkyrie" Dimaria Yesta (God Soul: Chronos)
13. "Black Steel" Gajeel Redfox (X792/Dragon Force)
14. "Country Demolisher" Brandish μ
15. "Sky Goddess" Sherria Blendy (X792/Third Origin Release)
16. "Desert King" Ajeel Ramal
17. "Master Assassin" Jacob Lessio
18. "Historia of the Dead" Neinhart
19. "Titania" Erza Scarlet (X792)
20. "White Ribbon" Kagura Mikazuchi (X792)
21. "She-Demon" Mirajane Strauss (X792/Satan Soul: Seilah)
22. "Ice Devil" Gray Fullbuster (X792/Ice Devil Slayer)
23. "Fairy Tail's Master" Makarov Dreyar (X792)
24. "2nd God of Ishgar" Draculos Hyberion
25. "3rd God of Ishgar" Wolfheim
26. "4th God of Ishgar" Warrod Sequen
27. "Iron Rock" Jura Neekis
28. "Princess" Lucy Heartfilia (X792/Star Dress: Leo Form)
29. "Sky Sorceress" Wendy Marvell (X792/Dragon Force)
30. "Dark Enchanter" Freed Justine (X792)
31. "Ace of Sabertooth" Minerva Orland (X792)
32. "The Shadow Dragon" Rogue Cheney (X792)
33. "The White Dragon" Sting Eucliffe (X792)
34. "Great Sea" Juvia Lockser (X792)
35. "Beast Arm" Elfman Strauss (X792)