Your list is absolutely on track @nainaztengra.
You'll have to do some research. I'm only well aware of two of them. I wish we could have a little introduction of each one of the witnesses to give each one a fair chance for getting elected by our fellow Steemians.
steemchiller, from Germany, made steemworld.org and has been with us through thick and thin. steem-agora, from Korea, is a very outstanding promoter for the steemit platform and a very strong believer who is a top leader in the community. I think we need more explanation about the other witnesses (which I'm sure are ALL spectacular individuals). Can you find out this information and write a post so that Steemians can vote?