Erzherzog
Magister
Most of them are pretty good value for jewroes. But stick to the free champions to begin with. You need to have an idea what everyone can do by the time you hit 30 and feel like ranked. Messing about with whatever's free this week is a good way to try champs you otherwise might not.
The bundles mostly contain older champions mind you, and there has been some power creep since then. Several of them are still seen regularly in competition matches, but there's going to be a lot of dead weight (lol, Poppy) in them as well.
How about Nunu?
He seems to go from top pick to never play quite often with nothing in between. Pretty equal as support or jungler.
Also, my coworkers are weirding me out lately, this game has definitely become the IN thing. I knew one guy streamed, didn't know he was diamond freaking 1.
On my way out of work today, the guy in charge of our entrypoint who also outranks me (I'm in Navy) held up people leaving/entering the ship to argue with me about the merits of Blitzcrank.