I've tried a lot of different monitor setups for productivity - ranging from three 24" 4k displays to a single 49" ultrawide, and ultimately have found the best setup for me is dual 27" 4ks, each running at a "scaled" 2560x1440.
MacOS in particular does an excellent job of rendering 2560x1440 to a 4K screen, and the increased DPI over a regular 1440p 27" screen is very noticeable.
Another option if you're not a fan of 27" displays is a pair of 24/25" 4k screens which can be run at a scaled 2304x1296 resolution. This still provides a decent amount of space without text being too tiny. Alas, 4k monitors <27" are increasingly rare these days.
MacOS in particular does an excellent job of rendering 2560x1440 to a 4K screen, and the increased DPI over a regular 1440p 27" screen is very noticeable.
Another option if you're not a fan of 27" displays is a pair of 24/25" 4k screens which can be run at a scaled 2304x1296 resolution. This still provides a decent amount of space without text being too tiny. Alas, 4k monitors <27" are increasingly rare these days.