A Liberty engine is a far inferior thing to the intended Meteor, the bulk of the Centaurs produced (c.1000) were retained as 'Centaur I' and used for training. These formed the basis for most other models. Centaur III was up-gunned to take the QF75mm.
Centaur IV with the 95mm is indeed the 'official' variant that saw action, and acquitted itself well, RA drivers with RM gunners.
However... In 1943 many Centaurs had been converted to Cromwell specification as the supply of Merlin based Meteor engines improved, it could be said that these were in some way, Centaurs.
The chassis left over after Normandy also went to war as OP tanks for Some Cromwell units , an abortive conversion to AA mountings of twin Polstens as 'Centaur AA, Mk1 & 2. Some also served as ARVs and a handful as Kangaroos but I have very sketchy info on them:
Perhaps one of the most significant Centaur variants was the Dozer, which found itself a most useful device, clearing paths through the rubble of destroyed European cities:
I know I've got something on the mechanics of the RM Armoured Support Regiment giving up their Centaurs after D-Day but the book it's in is lodged with a mate at the moment, so the best I can remember is those men moved onto training with LVTs in preperation for other specialist assaults, but don't quote me on that.
Edit: Ah, I see I've cross-posted with Bod and he's covered that

.
Got a feeling I've seen pictures of the postwar Greek army packing Centaurs too.
Cheers,
Adam.