DCA and EWR are similar with both having around 70 FO lines.

Here is a list from most lines to least lines:

IND 100+
LGA 100+
CMH 90+
PIT ~70
DCA ~70
EWR ~70
SDF ~50
ORD ~50
PHL 30+
BOS 30+

Some months LGA has the most and others IND. Both are pretty similar in size.