I've owned a lot of the names dropped around here. Currently using the mxr bod, ie SubT, and mantic density hulk.
Mxr is the pedal I've owned longest. So much a part of who I am. Active and passive both work wonders with it. I've just learned to work the pedal and it does what I want it to.
SubT is used mostly for the synth voices, but I concede that it's octaver is superior to the mxr in tracking, though the tone is different enough. Hence I have both on my board.
Density hulk is there to bring the brown note. Meatbox might also do it, but I prefer the hulks rock solid construction over dod.
Oc2 had I volume drop I couldn't hang with.
Digitech bsw was a good pedal, but redundant for me.
Line6 m9 has fantastic octave and pitch shifting. Always keep them around.
Eventide h9, the octaver is kind of boring to me, but I use the pitchflex to do the dive bomb -1 sound. Pretty rad for that.
Never tried the Aguilar, but it's on my list when I get disposable income again.
But yeah, I'm also addicted to octavers. If I only brought 1 pedal to a gig, I'd be real tough to choose between drive and octave.