an anthologist? The general word is an editor.
How to cite collected works: It's either referred to as an editor or called a publisher.
http://blog.apastyle.org/apastyle/2013/09/how-to-cite-an-anthology-or-collected-works.html
http://study.com/academy/lesson/edited-book-definition-examples-quiz.html
Edit
I got a journalist to answer the question. Well, it turned out you're neither an editor nor a compiler. :-) I asked him about you writing an article using strict quotations and paraphrasing, not including any original work of yours. I mentioned that you'd obtained the content from some interviews with a couple of experts, and quotations from various written sources like newspapers, books, and articles. I'll quote,
'let's assume that you're writing an article (such as you suggest) where you are providing the connective thread that ties everything together. Yes, it may be that 80%-90% of the article is outsourced, but simply listing the attributed paragraphs without your connecting thread would actually make the article incomprehensible. The point or theme of the article would be lost without your contribution, minor that it may be. In this case, you are the author.
...you are the author of the work. Authorship means you wrangled the words. It does not mean you originated the ideas. If you composed the words, selected the quotes, and put it all in order, you are the author of the work. Since you are not advancing an argument of your own, the work is one of reporting, not argument, but that does not change the fact that you are the author of the report.'