that's how i do: get 3 osc; combine 2 sawtooth, one of them an octave higher, then a square or pulse, or anything you would like to try.. tuning it to match the lower octave of the sawtooths.. u can do variations.. like 2 square and a saw.. for a another dominant tone, etc.. this add richness to the lower bass harmonics while maintains a touch of higher frequencies soo it do not gets muddy. (play with the osc volumes) then.. i like to eq in a way that focus upon +-65hz.. taking out extreme sub below +-27hz with hp and lowering the first octave above this (27-54hz) with low shelf. (remember that the shelf starts lowering much above the freq u choose) then add some gain in the +-65hz freq.. with narrow EQ to not overpower. i dont like to compress, since doing this will tame the powerful frequencies u just get where u wanted, lowering the gain u added, making it flatter again. it works well for me, good luck.