Santi and Ramsey won us the first FA cup. 2nd was a walkover. 3rd cup was more Alexis and even Welbeck, but Ozil was also very good in a combination of those 3.
I would strongly disagree with him making us title challengers. In fact he is quite flawed and one of the main reason we kept failing (lightweight in midfield, no urgency and workrate etc) which shows in big games. Of course our unbalanced team doesnt help but he is part of the reason.
Just for e.g. he had a lot of such moments in front of goal when Saka or Odegaard will shoot resulting in a higher percentage chance of goal. He always passes and the move breaks down.
On a side note, as @RocktheCasbah mentioned Alexis, I saw his name on a Saka feature today and he stats was genuinely incredible. Alexis was world class.
https://www.premierleague.com/news/3116370#:~:text=Bukayo%20Saka%20has%20become%20the,Arsenal%20record%20in%20the%20process.