I use a single monitor AND a light theme for my IDE.

The Galaxy S21/22/23 is slightly larger than the OP's Pixel 5 however. The Zenphone 9 might be a good option as it's around 2mm narrower - not a lot but it'd be noticeable for one handed usage.

This might be a bit off topic, but Windows 98, and to a lesser extent Windows XP and 7, always evoke a sense of nostalgic simplicity for me. The OS felt stable (as in, unchanging) and seemed to stay out of the way.

Since Windows 8, but especially with Windows 10 and 11, it's felt complicated, busy, and intrusive.

GSMarena's HTC Titan review is funny in hindsight: https://www.gsmarena.com/htc_titan-review-675.php

It's significantly smaller than the 'small' S23