These are 27" OLED at 4k. I couldn't find more:
Philips 27E1N8900
ASUS ProArt PA27DCE
They are not good for text though I believe, due to their OLED pattern, as I assume they use an older LG panel. But rumors (That is, TFTCentral) haven't stated anything about new LG 27" OLED panels with updated pixel structure through 2026, so your only hope for a proper pixel layout is from Samsung. They MIGHT be coming out with some new generation panels here late 2025, but whether that turns out to be true is up to anyone.
There is no perfect OLED monitor out now, unless all you do is gaming or watching videos.