It wouldn't hurt especially since this is an RFE.
The tax transcript should contain all of the totals related to your W-2s, 1099s, etc. That doesn't mean they can't ask for the specific forms.
The last time I did one (for my mother-in-law), I included my W-2, my wife's W-2, two 1099-Bs, a 1099-DIV, and a 1099-INT since I had them. It was probably too much but I'd rather send too much than not enough. I didn't send the 1099-SAs (distribution from a Health Savings Account) because it doesn't show income per se.
Regards,
Vicky's Mom