Tine orientation on a Landscape Rake, York or other brand, is vertical. Tines will grip a rock but if stress grows, flex and slip off, saving the tine from bending, usually. (I am aware York offers construction grade rakes, used in highway construction.)
Cultivator tines (most) move through soil horizontally. Cultivator shovels are designed to disrupt juvenile weeds, not rocks. Operation is IN the ground, not OVER the ground like a Landscape Rake.
I have both implements. I would NOT use a Cultivator, especially a 'classic' Ferguson, for pulling rocks.
A third implement, a Field Cultivator, is a relatively light version of a Chisel Plow. Field Cultivators have narrow points and spring protection for the shanks. Field Cultivators will drag up moderate size rocks. Better at dragging up subsurface roots and vines. Field Cultivator will penetrate to 10" soil depth. New cost, depending on size, $700 - $1,000. Should be available used in Pennsylvania. Old brands: Ford/Dearborn, Bush Hog.
(Field Cultivator is another Harry Ferguson design, from 1936.)
Single shaft Potato Plows and Subsoilers are often used to work rocks in single rows.
Photo #1 - Everything Attachments Landscape Rake
Photo #2, #3 Woodward Crossing's 'Wunderbar' Tool Bar Cultivator (Pennsylvania vender)
Photo #4, #5, #6, #7 Dirt Dog (brand) All Purpose Plow more commonly known as a Field Cultivator.
