Realforce variable has many switches that are 35g or less, although some of the switches (e.g. spacebar) are heavier for "ergonomic" effect. I think there are some rare Topre keyboards that are uniformly 35g.
I have a uniform 45g Realforce and it definitely feels lighter than the Das with browns that I used to have (in addition to having a very different actuation feel in general. You should try out Topre if you haven't).