Oh yes!!!!, they do have large and heavy engines (if I remember well, it should be around 1/3 of the total weight for the Camel)... but who are not too much forward to the wings and the center of lift... so globably the center of gravity is at the rear of the center of lift.

For the Camel, the gaz tank was at the back of the pilot. When it was full (at take off), it pushed the center of gravity a little bit too rearward.