Hi Anthony,
Sometimes getting a sub together can take as long as writing the book, can't it? It's not easy, but you have made a great start. I have the same two names as you for Creston and Innovation, but I always do a google search of the name and publisher (together) to check to my best knowledge if the editor has moved on before submission. When there are a number of names listed (as you've mentioned from in The Book), you could either do as you've suggested, or research each name on a search engine to determine which editor is the best fit for your ms. Eg who concentrates on YA, who likes PBs, who likes social issues, who likes nature, etc.
I hope this helps.
Julie.
PS After all the research you've done, put your results into a database to make it easier next time you submit. Gradually you'll grow quite a useful list, although you'll still need to double check they haven't moved on each time before you submit, and update your list as required. Best of luck.