Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Upright

Upright as a ramrod.
—Anonymous

Upright as a sentinel.
—Anonymous

As upright as a stake.
—Anonymous

Upright as a young apple tree.
—R. D. Blackmore

Upright, like a taper.
—Osmanli Proverb

Upright as a tower.
—Charles Reade

Upright as a wooden sentinel at the door of a puppet-show.
—Sir Walter Scott

Upright as the cedar.
—William Shakespeare

Upright as a wild Morisco.
—William Shakespeare

Upright as a sheer cliff’s wall.
—Algernon Charles Swinburne

Upright as an heap.
—Old Testament