Although only a loanee, Flabbier Donkey did.
I should be writing reports, but instead I'm going to make it the sole intention of my evening to find at least three more.
EDIT I'm claiming Jeremy Charles, but this is harder than I thought. b****r!
It is tough - I could've sworn that Dean Whitehead was going to be one.
But despite playing for us 20 times in the third tier, he didn't score his first goal until the following season in the 4th (a 3-2 win against Rushden that I remember well, because I went straight to the pub afterwards and watched England win 5-1 in Germany. A great double header of a day!)
Surprising as it sounds, I think
Manny Onoyinmi is actually one.
He scored a whole two goals for West Ham in the Premiership (both in the same game) when he was a youngster
He scored three goals for Gillingham in the second tier when he was on loan there (including an absolute blinder against us at the Manor)
He scored a solitary goal for Orient while on loan to them in the third tier
And then he scored a few for us in the fourth tier (as well as several for a number of clubs in the Conference)
Bringing back more terrible memories, but
Phil Gray is another - scored for Luton when they were in the top tier pre-Premier League; scored a bunch for Sunderland in the second tier; then scored for us in both the third and fourth tiers.
Finally, I think
Sam Ricketts did it too.
He scored one goal for us in the 4th tier; one goal for Swansea in 05/06 in the 3rd tier; one goal for Hull in 06/07 in the Championship, and a single solitary goal in the Premiership for Bolton in December 2011.
Rather brilliantly, at that point in his career, he had scored exactly one goal (and no more) in each of the top four divisions; although he later blew that statistic by scoring a couple of League One goals for Wolves and unforgivably scoring for the Scum in the League One playoffs.
Right, that's three. I can go do some work now.