hi luke...it is important, first and foremost, to narrow your choices down. most of the top univs will have a strong faculty in modern & contemporary drama but it is important to find profs who are doing the kind of research you are interested in...trawl through the faculty list & their research interests & email them for further information. This is really important as the information that you glean should also show in your SOP. The universities are looking, along with other things, for a "fit".
The importance that univs, even top ones, attach to General GRE scores varies considerably. What is important, however, is to have a strong all-round application. Speak to the people who are giving you recos, update them on your academic history, your extra curricular activities, and discuss motives for applying to grad school. Another important element is your sample writing, which must show a strong potential for academic work & research, and an ability to contextualize, question & explain.
Did you do the GRE in Literature? High scores in that may also lend a helping hand!
I'm applying too & understand how overwhelming it all seems...but just focus & give it your best shot
all the very best!