This is a fantastic site that tested the spectrum and flicker of LED bulbs. The author seems to have stopped, but I think it’s still useful.

http://ledbenchmark.com/

Lutron (the inventors of the dimmer) have a pretty comprehensive database. They test a lot of lights, and not all are listed. If you're buying their dimmers, call and ask if you have specific lighting pairings in mind.

http://www.lutron.com/en-US/Pages/LEDCompatibilityTool/Compa...

These are the 2 best I've found:

https://www.derlichtpeter.de/en/light-flicker/market-tests/

http://fastvoice.net/led-testberichte/

We went 100% LED back in March 2014 with Philips CorePro bulbs and haven't had any issues. Either they don't have these issues, even back in 2014 (they were certainly highly regarded at the time), or perhaps my wife and I just aren't sensitive to this flickering.

Edit: Incidentally every single bulb (15 of them) is still working too, we haven't had any issues with them failing.

I have no issues with Osram Lightify GU10 bulbs (EU version), on the other hand I have proprietary fittings with Cree LEDs and Osram drivers that do flicker. So even in a single brand there can be issues...

The Wirecutter reviews a few, but it's not a complete list: https://thewirecutter.com/reviews/best-led-lightbulb/ .