|Your first four screenshots are what will really sell your game.|
That's why I'm still carefully capturing mine.
I thought I was fine just using a set aspect ratio in Unity but that only applies within Unity and not on actual devices of varying screen sizes. It's a total headache and the best solution I've found so far is to use the biggest resolution I know of for my camera screen size and shrinking it to fit on everything else. Out of everything I tried those results looked the best so I locked that in code.
This nightmare of minor details are going to be carefully considered when working on my next game.