There are LED bulbs designed to work in dimmer switches. I don't remember the model, but I had one that worked with my dimmer switch in an old 1970s era buildin

There are LED bulbs designed to work in dimmer switches. I don't remember the model, but I had one that worked with my dimmer switch in an old 1970s era building I lived in. My current apartment came with CFLs and a dimmer switch. They work well with the dimmer. It's a pretty new building though, so perhaps the switch was designed with them in mind. It might be worth looking at new switches to see if they help with LEDs.