Of the models you've mentioned, I find the DT770 to be the most comfortable and most roomy on my personal ears.
Since you've mentioned you're not a gamer, and that both sound quality and zero amp requirement are important to you, be sure to consider the AKG K361. The Cooler Master MH751/752 or Takstar Pro 82 are also great considerations. They both have a great comfort/price ratio.
The 770, even in its lower impedance 32 ohm variant, does scale well and get louder with a dedicated amp. I don’t like to blast my ears, so I find the 32ohm and 80 ohm models perform okay without dedicated amp hardware…but they’re not the most sensitive headphones on the market.
The Cloud Mix performs about as well as the Alpha. I wrote an exhaustive article comparing it to other headsets and the HyperX family.
If you need the roomiest ear pads, your ears *may* still gently brush the inside of the pad wall on those HyperX models depending on your ear and head size. The Cloud Revolver and Cloud Alpha S have the roomiest fits I've experienced in the HyperX lineup. Even when my ears gently touch inside, they at least pad that surface with some foam so it's not the worst thing.
Again, since you said you aren't a gamer, there's no harm in considering non-microphone options if you can find them in your area. The Sennheiser 500 series is a great range of models with huge pad openings, and both closed and open models are available depending on your isolation needs.
Also, if you don't like the look of the red accents on the Cloud models, the Cloud Alpha S comes in a new black variant that looks quite nice.
Hope that pile of information helps you out in some way. Thanks for reading!