I think there are many ways to achieve the sort of sound you're after.. I've been lately experimenting with an old school method of a short ~20ms slapback delay.
Most producers (in EDM) would generally use multiple instances of the same soft synth pitched an octave up or down (+- 12 semitones) or the notorious -5/+7st trick which may work in some cases, but when it's overdone it sounds very generic and can use a lot of CPU.
Layering in general is a form of art and involves very precise EQing and panning.. also lots of compromises because of the stereo to mono conversion. In my opinion it's better to get one lead (maybe even a mono one) sound great and work from there..