Like for example Roy Kinnear's band manager from Mike and the Mechanics "All I Need is a Miracle" music video. When he arrives in our world, at least some people will try to treat him as if he's Roy Kinnear... only, he's not, he's an unnamed 1980s band manager. Any other fictional characters you'd like to bring to our world?
That boy from "Last Action Hero". John Malkovich from "Being John Malkovich". Christopher Reeve's Superman.
I'll agree with Christopher Reeve's Superman. The Doctor (Preferably 10 or 11) The group from Big Bang Theory, since they'd be cool to hang out with. The whole town from Gilmore Girls Michael Scott from The Office Wilson from Home Improvement as my next door neighbor, since he could solve all my problems. Jeannie from I Dream of Jeannie, since I could really use a jeanie. Arthur Bach, another fun one to hang out with, and he could share his $750,000,000 with me.
Jean-Luc Picard. Just to see how far he gets with 2017 tech. ("I need a kettle and have to jiggle a tea bag to get Earl Gray, hot?!")
"The A-Team" character played by Mr. T. Walker, Texas Ranger. Rambo. They'll put together they're own little army and go kick every square inch of Isis ass.
The Doctor's too pacifist to deal with many of the real world's threats. Remember, "any more talk of executions and you'll make me your enemy"?
The entire GIJoe team, as written for Marvel comics by Larry Hama. Bring'em to this world, point 'em at ISIS, make popcorn and watch.