My best guess...... Common Mullein (Verbascum thapsus)
Newcomb's Locator Key 532
5 - flowers with 5 regular parts
3 - wildflower with alternate leaves
2 - leaves entire
Coarse, woolly plant with a dense spike of yellowflowers. Large (4-12" long), soft-velvety, oblong leaves, the largest ones ina basal rosette. 2-8 foot high. Figwort Family.