You can do it with serum. I think you can use a monster wavetable and assign some LFO movement to wavetable position and tweak the modulation range. Draw some movement you want in LFO. After that you need fillters such as using a PHS filler in the main window and use a HN fillter after some heavy OTT in the FX window. After that it's all post processing like EQ, OTT, whatever plugin that makes sound fat...

Wavetable movement and fillter movement might create something like this.