In addition to poems considered to be by Shakespeare (I, II, III, V), consider these:
"Sonnet IV: Sweet Cytheria, sitting by a brook."
"From the point of view favoring an historical affair between Oxford and Elizabeth I, this is as blatant a Mrs. Robinson-like failed seduction as could be packed into the Shakespearean sonnet format" (Ray 23).See also:
Ray, W.J. "Proofs of Oxfordian Authorship in the Shakespearean Apocrypha." The Shakespeare Oxford Newsletter 45.2 (September 2009): 22-27.