stump puller, or stump dragger?
if you are wanting to pull stumps. do a search here on TBN for A frames and tree puller, along with chain chokes. put metal A frame up near tree. run a chain around bottom of tree and up over A frame, and then down to tractor or truck. the A frame transfer forces of pulling horizontal to vertically, and pulls up on the tree vs side ways.
if you leave say 9 feet of trunk on bottom of the tree, you can use place chain around top and pull tree and roots out. or perhaps use FEL (front end loader) of tractor to push tree over.
backhoes for tractors, or excavators do good.
if you are not going to plow, till area, you could rent a stump grinder.
if you are wanting to drag a stump / log. getting the end nearest to pull vehicle up and off the ground some so it does not dig into the ground helps a lot. if you can get get end up on say a small pull behind car dolly or they make a kinda of a trailer. that you place near end of the log. and then use some rachet straps, to lift end of log up. and then hook up to hitch of truck or tractor and pull log to were ever.