oh gosh, there's no way i can remember them all. so these are off the top of my head... i don't really remember the opening acts though. i've seen several of these more than once also.
i don't like country or hip hop/rap, so my tastes are somewhat limited, or so i'm told
rem
pearl jam
keane
bush
weezer
no doubt
james
beck
eels
tool
hootie & the blowfish
they might be giants
goo goo dolls
soul asylum
stone temple pilots
matchbox 20
smashing pumpkins
verve pipe
filter
foo fighters
toad the wet sprocket
mighty mighty bosstones
the cranberries
marcy playground
dave matthews band
matthew sweet
better than ezra
tragically hip
there were also a bunch of christian concerts when i was younger...
audio adrenaline
dc talk
michael w. smith
carmen (?) was that his name? lol
and those are the only names i remember, but there were tons of those.
stand-up comedians...
janeane garofalo
jim gaffigan
zack galifianakis