4 voice drone by NTRMN
Tune OSC2 to a low root, OSC1 to a 5th below, LFO to an octave, and adjust the FREQ resonance to whatever you feel like. Opening up the VCF envelope will get the FREQ resonance voice moving around. Switching the OSC mix around makes for a nice chord progression (I > IV).
Opening up the VCA bias so it's a lighter drone so you can still hear the pulses is nice, but not necessary.
Moving the LFO shape knob around could possibly make for some out-of-tune tension (depending on how well you've tuned the FREQ resonance voice)