If AMD is a consideration for you:
I have an RX5700XT and is more than capable on a single 1440p screen with modest quality settings. At 1080p (single screen) it would be a walk in the park. I have mine doing 1440p triples at lower quality settings, so even triple 1080p should be doable. Unfortunately I don't recommend it unless you're getting a super wicked deal. The 5700xt has some hardware issues, while mostly worked out in the drivers, is still not 100% perfect. The 6600XT or 6650XT is about the same performance and doesn't suffer the issues the 5700xt had.
An RX6600 non-xt might even work well, but please stay away from the 6500. That card should have never existed. lol