a roller to smooth out current ground, that just does not seem right at all to me bud.
a 3pt hitch box blade, that has a set of ripper teeth, and FEL (front end loader) with general duty bucket on it. would be my first attachments
then see about a chain harrow or drag harrow or like. possibly a 3pt hitch landscape rake / york rake, and/or 3pt hitch rear blade.
a bolt on or like tooth bar for FEL if you need to dig with FEL and move a descent amount of dirt around possibly. a good standard flat cutting on FEL can do some descent rough back grading, not final grading but rough grading.
a roller just compacts stuff, it might be used as a final something. but for roughing things up and smoothing things out... i am scratching my head, thinking... ya need to look at something else first.
a motor grader, but some sort of 3pt hitch attachment or trailer type setup, if ya wanting to get rid of some long / large low / high spots.
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so many folks for what ever reason put MAX PSI in tractor tires *shakes head no* lower the PSI.