FYI, we usually call that "active PFC", but rectifiers can also be used passively to give high power factor -- what might be terms "high PF rectifier".
In three-phase systems, we can use transformers to construct any phase angle we like; by interleaving many phases, we get a "6N-pulse" rectifier (N = 1, 2, ...). The normal 3-leg FWB is a 6-pulse rectifier, which has ~0.9 PF. Using a delta-wye transformer, we get a 30 degree phase shift almost for free, and adding another 3-leg FWB, we get a 12-pulse rectifier with even better PF. And so on. These are relevant to very high power (MW+) industrial systems, where simplicity and reliability, and economy of scale to some extent, overcome the size/weight/cost concerns that are more important to smaller equipment.
This isn't applicable to single-phase systems.
Tim