VFE Enterprise or Tractor Beam (later version). Can switch between 2 and 4 stage phasing as well as a 3-stage fet univibe sound. You also get feedback control as well as a mix which goes into vibrato when turned up. Discontinued and hard to find but worth going for if one pops up somewhere.
Sometimes simple is good. I have a Heptode phaser with 3 speeds that it ramps between.
Also have a Moogerfooger 103, MXR Phase 90's, Little Miss Sunshine, Mu-FX Phasor, Lillian and a lot of other usual suspects.