Vlad isn't really a carry, but he's so easy mode, most people should be able to play him just fine. Once he hits level 9 in a lane, those laning against him really can't do much of anything (unless he's been feeding or ganked by a jungler or something)...
The main thing I've found I enjoy about playing with friends is we know how each other play, so we can be more offensive at times, knowing that if we make a small mistake, they can help bail us out usually...
Oh, and for free champions this week, Mordekaiser (built properly), is and unkillable crazy champion. Can't really dish out super extensive damage, but he can take damage for days (with enemy minions around, for years)...