Middle America
Milquetoast
a nobody
a nothing
absence
baby
big baby
bourgeoisie
burgherdom
chicken
cipher
common man
crybaby
deprivation
doormat
dud
dull tool
dummy
emptiness
figurehead
fourth-rater
gutless wonder
hollow man
insignificancy
invertebrate
jackstraw
jellyfish
lay figure
lightweight
little fellow
little guy
man of straw
mediocrity
meek soul
middle class
middle order
middle orders
milksop
mollycoddle
namby-pamby
nebbish
negation
negativeness
negativity
nihility
no great shakes
no prize
nobody
nobody one knows
nobody special
autocrat
dabbler
dilettante
incapability
nullity
poseur
windbag
entity
identity