I am glad you found a 'solution' to your query! For what its worth I think it is well within the power of a wish (maybe triggering the 33% chance of NEVER casting again) to ameliorate a vampires bloodlust (forever more and with no penalty at all associated)... This vampire still gains awesome sustenance from mortal (and immortal!) blood but doesnt have an irresistible urge to sink their canines into the jugular of any dude dame or dog that walks by... Maybe this was more of the flavor you were looking for and it is INDEED well within the power of a wish as this is more a flavor or RP or ribbon kind of change to the character and not really at all a substantive POWER INCREASE... but a good old ceremony is also great of course!
I don't disagree that a wish (at a risk) could probably ameliorate a vampire's thirst for blood, but it matters less what you or I think and more what the OP's DM thinks. They might feel that the thirst for blood is inherently tied to the curse of vampirism and that no mortal magic can undo such a curse.
My personal lore for vampires doesn't give them an irresistible urge for blood. Rather, they enjoy it and require it for sustenance. Couple this with their evil alignment and most vampires come to see people as walking bags of blood with an amusing penchant for conversation. It's as if though a steak lover lived in a world of sentient cows and viewed all of them as walking, talking filet mignon.
So, IMC, if you can resist the curse sufficiently to avoid the alignment change, you never gain an irresistible urge for blood. You still need it, but you can subsist on animal blood, despite that it isn't appetizing (which for the steak lover in the previous example would be equivalent to forcing themselves to eat a vegan diet). An evil vampire would never choose to do that - it would be like Ron Swanson (Parks and Rec) choosing to eat salad instead of steak.
The point being that IMC if you can fix the alignment, you fix the whole drinking people issue. So, depending on how the OP's DM views vampirism, certain approaches might or might not work.
As an aside, the one issue with the Ceremony spell is that the subject must be willing. Will an evil vampire willingly participate in a ritual intended to restore their goodness? Up to the DM.