No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
You are ok with several cards reporting. The only 1 card reporting is for max score.
No you don't need to bring the balance to $0. The banks give us cards to use, not to report $0 balance. If you have a low balance (less than 30% or better if less than 10%), then there is no problem.