My favorite, only because it was my second pedal ever, was a 1976 EHX Small Stone. My favorite in my collection now (and the only phaser) is a 1980 Ross 'Phaser,' which is extremely close to the MXR Phase 90 script. The only difference is they added a regenerate control topside, to allow for the syrupy-ness to go from thin to thick.
I do not know which PedalPCB offerings come close.