Yes, many, many people.
I believe LSD is in no need of a companion drug.
I have in the past used several substances in combination with LSD, such as cannabis, ketamine, md** compounds, 2c-* compounds, tryptamines, amphetmaines, cocaine, benzos, and opiates/opioids. However LSD by itself is just something special to me.
Nowadays, if I use LSD in combination with something (which is rare), it is always either cannabis or ketamine.
lsd and ketamine + laughing gas = pure heaven
Careful that might not be for everyone, I personally find it makes me paranoid since I don't toke that frequently anymore. When I did, however, it was a good mix.