Lessee, where to begin. First, the good news is that those "macro" sliders will do, essentially, what you want. They correct both pitch and drift. And they will do so up to 100% correction. And if your singer is already very close to pitch and has minimal drift your work is finished. Just set your detection method default to "melodic" in the Melodyne settings menu...transfer your file into Melodyne...and move both the pitch slider and the drift slider to 98% or higher. That's it. Only it isn't.
In the real world even singers who possess very good pitch sing sharp and flat on certain notes...they also scoop into notes and overuse their vibrato...they attack notes too hard and too soft...they hold notes too long or sing them too short...they get off the groove...even if ever so slightly...they still do it. And Melodyne (or VVocal or AutoTune or whatever) has to try and "guess" what they were trying to do but didn't. On not just every word...or every syllable...but every consonant and every vowel...every utterance of any kind. It's amazing it can do as well as it can just using the "macro" sliders.
To get a thoroughly pro performance/edit where your vocals don't sound like they've been "autotuned" (even if you're using AutoTune, VVocal or anything else) you'll have to go note by note and edit not only the pitch but the pitch drift, the vibrato, the scooping and many times even the length and attack of the notes. It might seem tedious but once you get the hang of just a few of Melodynes main tools it's really rather intuitive and you can quite literally work miracles with it. And all without any aural artifacting. Essential itself is an amazing piece of software and the full blown Editor is nothing short of black magic. But it is still just a tool, albiet a very very good one. And you'll have to learn how to use it. Take some time and a vocal track and just go through and learn what each tool does and how it operates. Experiment. Goof around. Check out a bunch of the YouTube and Celemony video tutorials. Don't use something from a project that has an upcoming deadline. Just relax and get to know the program. I honestly think that if you'll devote just a little time having "fun" with it and experimenting with it instead of "needing it to do something right now" you'll come to see that once you know it, Melodyne will be able to get whatever the heck you need done to your vocals easily, quickly and intuitively. At least I hope so. It has for me for years now and has allowed me to amaze many folks with the results. YMMV. Good luck , ol pal.