I was gonna say Edo Itachi but we haven't seen all of EMS Sasuke's abilities. EMS Sasuke may very well be a proficient genjutsu user seemingly on healthy(not-dead) Itachi's level considering half of his eyes are his . EMS Sasuke may have Tsukyomi as well as other genjutsu which Itachi had which makes things interesting. It's still hard to say
The only reason I put Sasuke above Itachi right now is because of Itachi's Susanoo would drop before Sasuke's due to the MS strain and his illness. While he is an Edo he has neither of those things so yeah I put him above EMS Sasuke.
But it really isn't fair to pit Edos against Alive characters, especially in this situation.
Edo Itachi can take him itachi with unlimited chakra and stamina is a very dangerous combo as he can spam his OP, Mangeyko techniques without feeling the drawbacks. Alive Itachi on the other hand will lose he hasn't got the stamina needed to take down Sasuke.