Sean Connery and "F," or Tom Cruise and "W" would both be good substitutes.
A frequently-quoted example is from Coleridge's "The Rime of the Ancient Mariner":
“The fair breeze blew, the white foam flew,
The furrow followed free;
We were the first that ever burst
Into that silent sea.”
Note that "breeze blew" and "foam flew" start with the same letter, though not exactly the same initial sound. Still counts as alliteration.