The top 5 god dragons and Igneel can each solo the Alvarez Empire. The 6 of them combined would stomp the ever-loving soul out of the Alvarez Empire in a stompfest so hard it's actually against the rules to make a battle thread with these conditions because of the rules against spite threads. The only way to reach the level of any of these dragons is to do what Acnologia did and become a top tier dragon yourself with dragon slaying magic. This alone tells us that dragons are stronger than humans.
Like I said, there are no Spriggans in the top 10s while there's like 6 naturally ocurring dragons and 1 guy that turns into a dragon. Even if you ignore the parent dragons (all of which are stronger than Irene, because they have more MP than Wendy and more physical strength than Erza) and White Witch (who is Zeref level by hype, and at the height of her powers had all FT's mp), Animus with Dragon Cry still scales to the power level of every dragon that died during the GMG. He has the feats of stabbing a hole through Natsu (who only survives this due to massive unexplained POF shenanigans), which is leagues upon leagues better than making Natsu's arms react.
But even if we say Irene is stronger than dragon cry-powered Animus.....Congratulations. The one Spriggan you managed to sneak on the list is still a dragon. Like Acnologia, Irene is at her strongest when she's tapping into her powers of a dragon. She even tells us to cast her master enchants, she is tapping into her wisdom of a dragon. Maybe we can split the 10th spot 50/50 with August as well, but at this point we're reaching the pinnacle of human magic and he still doesn't beat out any of the dragons on this list.
The GMG dragons were no-selling attacks from things like Kagura's archnemesis and Erza's swords, as well as the weapons of Crocus' army. There's no chance a regular human is killing Zirconis with a spear. Irene herself said that even though Erza can destroy a meteor, she still cannot cut a dragon's scales. If the soldiers 400 years ago were piercing dragons with regular spears, then they at the very least must be striking with force greater than Erza's meteor splitting slash. That would make each one of them stronger than any of the Spriggans anyways, and they're probably all getting their strength from dragon slaying magic.