Final answer:
Chardonnay is considered the fullest in body and driest in flavor among the given white wines, especially when oaked. Sauvignon Blanc, Riesling, and Pinot Grigio each have distinctive profiles with variations in sweetness and body.
Step-by-step explanation:
Among the white wines listed—Chardonnay, Sauvignon Blanc, Riesling, and Pinot Grigio—the Chardonnay is generally considered to be the fullest in body and the driest in flavor. Chardonnay wines vary in taste and style; however, those that are oaked tend to have a fuller body and a buttery richness. Wines made from the Chardonnay grape can also exhibit flavors of apple, pear, tropical, citrus, and melon, leaving a lovely dry finish on the palate.
In contrast, Sauvignon Blanc is known for its high acidity and herbal flavors, Riesling for its aromatic and often sweeter profile, and Pinot Grigio is lighter bodied with crisp and refreshing acidity. Nonetheless, each wine's dryness and body can vary based on the climate and region where the grapes are grown, as well as the winemaking practices employed.