I've come across a list of the highest FIDE ratings ever achieved by all 2700+ players in the 2700chess.com:
This shows all the players above 2700 in classical ordered by their FIDE peak rating. It also shows when and where the respective peak rating was acquired. (This can also be found on wiki.)
I tried to find a similar list for the FIDE blitz ratings but to no success.
It can be either for the top 100, or all players above 2700. Any of those lists would be good.
Curiously when i hover in the current live top 100 blitz ratings in 2700chess.com i can see the player's peak:
But it doesn't seem have a list with the best blitz's only.