Here's an Amazon Basics that has very low flicker. I have not tried the bulb myself. It looks way worse than the Sylvania bulb a few posts above, but the Sylvania bulb has amazingly-low flicker.
And here's that Maxlite bulb that also has very low flicker. These bulbs have been working well for me for a long time. It's unclear to me which one would be better for my eyes, but in reality they're both probably fine.
In general, my theory is that thin, smooth, and not vertical/not a high slope lines on a waveform are generally non-headache-inducing (as long as the flicker is 5% or below). Note the Y axis for this screen shot of an incandescent bulb is +-500mv, which is 10x the Y axis for the previous screen shots.
