Perfect 4k resolution

My ASUS 4k laptop is great, but it sometime looks too small.
It is 15" (not 17" as I did not find 17" touch screen 4k), so I guess it is expected

That been said, I was thinking of adjusting the resolution to fit my needs, after few years of living with 4k.
I tried several ones, until I reached below resolutions on my 15" 4k laptop.

Asus ANmASUS resolution
15" 4k screen
Original : 3840 x 2160
New : 2880 x 1620
Also : 3040 x 1710
Added 2019-01-03 : 2560 x 1400

TV Sharp 50" AQUOS
Original : 1360 x 769
Resolution screen laptop