I had just put this list together for a friend who asked where to get a tattoo and I was going to put this all in the comments of Officer Gleason's post, but then I remembered that I can just post it! Bwa-haha!
Other tattoo places I would recommend:
Cherry Bomb Tattoo
1579 N Milwaukee
James Kern at No Hope No Fear is awesome. And he's moved to Oregon. But the website says he's often in Chicago, so it's worth a shot seeing if you can make an appointment.
No Hope No Fear
1917 W Division St
1754 W North Ave
1459 W Irving Park
My roommate has a tattoo from the Tattoo Factory and would recommend them.
4408 North Broadway