guzr
Hi guzr,
GrapheneOS requires less power than stock Android, but enough memory, a larger battery and a large display = larger software keyboard (!) are always better.
If you can afford it, I would choose the latest Pixel = Pixel 9 Pro XL with at least 512 GB, preferably 1 TB of storage.
Then you don't need a cloud, you can save everything locally and that also saves data volume on mobile connections and is more secure.
Also bear in mind that cloud providers like to scan photos and that false alarms can quickly lead to suspicion of illegal photos.
Store maps, send and receive photos, greeting cards or screenshots via messaging may need much storage as artistic photography.
That's why I would choose the Pixel in the colour Obsidian, because only this one is available with the maximum memory configuration = 1TB.