As for MXR Pitch Transposer effects, the H910 H949 will get you close.  The A & B sides (optional) are set to identical values.  You did say “without glitch or artifacts”, so I left it at MODERN.

You may prefer an earlier Harmonizer model (TYPE).  It’s still going to get harsh, as the progressive octaves slam into the ceiling.  Adjust MIX and/or FEEDBACK (A/B), or maybe some downstream EQ.

For some good, clean fun, map an expression pedal to PITCH A & B:  Heel to 2.000; Toe to 0.500.  Tape stop slowdown & acceleration effects.  The REPEAT switch captures some glitchiness. Releasing the switch recycles it all through the FEEDBACK loop(s).