4800 IP

Well you have a bit of a list out of that category in the 4800 range.

Diana, Fiora, Fizz, Irelia, Kennen, Lee Sin, Riven, Talon, or Wukong?

I'm not sure if any of those fit you perfectly, but of those, Lee Sin is in the free rotation.

Maybe give him a try and see if you like him before making your decision.

Personally, I would go for Irelia of the champions on that list.

She has some good diversity in build options. She CAN be played as a tank, so you have that option for safety, but she is certainly not limited to that.

Fiora is a decent option for similar reasons.

Diana is a bit more of a mage, but is along similar lines. She also trends a little more toward the assassin life, but she is able to be played as a fighter as well.

Kennen is actually a good pick, but he kinda has that mage-ish feel a bit like Kennen, ... and he is actually about to get a nerf :/

Talon is also pretty far into the assassin category, and he just got a rework recently. I'm personally not sure how I feel about him, but he could be your style.

I find Wukong interesting, but he isn't really my cup of tea. He feels to me like I'm trying to trick my opponent more than straight up fight them, and the same really goes for Fizz.

Then there is Riven, ... Oh how the community dislikes Riven. She is a great champion, but my caution to you is that you could very easily get some ragers simply by picking her. Which may be what you're looking for. Some people are into that. It can definitely be to your benefit to tilt your opponents during champion select. The big drawback for her is that she actually does require a fair bit of dedication to master. Her strengths come from your ability to use her kit to proc her passive and use animation canceling to maximize mobility and damage output. It isn't easy to master, but if you get it down you can single handedly carry games.

As with any time someone asks this question, what kind of champions do you typically play?

However, if you are interested in Shyvana, I would say get her. She is actually 3150 IP, so you will save a little toward your next champion. She is also pretty strong right now, and having a skin for her already is cool. Championship Shyvana is one of the better ones too.

Have you tried any in the free rotation?

Whichever you enjoy playing.

Honestly there is many in the 4800 range i enjoy by far shyvanna is my favoirte i got her before the buffs and loved her however if you like kinda tank and fun rumble is great to. :)