Ultimate TinyMCE is one of the most advanced editors out there. It has a lot of options and you can do almost everything. You can design you toolbar so you only see the tools you want to use.
I haven't used it before but I have heard good things about it, I must say it doesn't look any different than any other word editors plugins but it's less complicated I guess.
Well it is a very comphrensive plugin. At first it looks like nothing special, but after selecting which functions you want in the editor it becomes very powerful. It can do tons of things the standard editon can't. I use a lot of tables and they can be automatic generated.