League of Legends (LoL) Question: Finding my main champ

Not everyone is built to main a champion. Some people just have a different main every few months and some just can't even main a champion for even a week, and just have fun by having a large champion pool. The worst thing you can do is force yourself to be a main. Being a main happens when your idea of fun is playing the same champion over and over, because you find them more fun than others. If that never happens to you, then just keep playing whatever you feel like whenever you feel like it. It may not be the optimal climbing strategy but having fun is way more important to climbing than anything else, becoming bored with what you're playing will instantly kill your passion for the game and will to improve.

Not myself, but one of my friends once was like this, didn't have a champion they mained. Suddenly one day, they played a champion and found they liked it a lot. It became their main.

Just try different champions. Maybe one day you'll find the one for you.

As an original top main with tryndamere, he does fit your requirements, and is easy to pick up, build versatility will come if you understand the champion well enough. but then again rn im playing a bit of evrything because i cant be bother finding a new main, so who knows? play for enjoyment, its a game afterall