Not sure the layout, but I do a lot of one-person heavy lifting (well, sliding actually) using a large sheet of cardboard between the item (plywood) and target surfaces to slide from one level to another. The cardboard protects both surfaces while reducing the coefficient of friction to drag/pull/push it up/down. I've moved things like sofas and refrigerators solo with this method.
But I second the rolling lift table Chris linked. I own one for multiple projects and I absolutely love it.
Consider a small winch on the table that drags the sheet up to the table by hooking on some straps you throw around the sheet.
If dragging would ruin the table edge, there are cranes that are made for things like this, and some clamp on truck beds to hoist wheelchairs into the bed. Could possibly be adapted right to your work table? 4x8x3/4" plywood sheet is roughly 75lbs and this one is well capable of that. May be worth looking at more of these, but the chances of things being less awkward for fixturing and catastrophic (building potential energy) is with the rolling lift cart.