Even incandescents can bother me now if I’m hypersensitized. I really love my flicker-free A19 LEDs I bought this year from Waveform Lighting - those and some much older (now unavailable) Philips flicker-free LEDs are always comfortable, even over long time periods. Waveform seems to be slowly expanding their flicker-free options, with several A19 options and some T8 tubes that will be flicker-free with an appropriate ballast. They’re the only current flicker-free LED manufacturer that I know of in the US.
For incandescents, I find Edison bulbs to be more tolerable than normal incandescents. Of course, most Edison bulbs are pretty dim, but I recently purchased incandescent 60W Nalakuvara ST64 Edison bulbs to replace some standard incandescent 60W GE soft white A19s that had enough flicker to bother me a little when I was hypersensitized. The Nalakuvara bulbs are actually just about as bright as the GE bulbs and the color temperature is slightly warmer, but pretty close. They still have a small amount of flicker and I’m not sure how it would be if one used them for a long time period - these were just the best option I could find that work on an existing dimmer switch.
I find incandescent candelabra bulbs to be better than A19s for some reason.
For a “best” option, for me it’s the actually flicker-free LEDs hands down.