Welcome to the forum Whitemikely. I am a brewer of some wonderful root beer and I only use champagne yeast. The bubbles are great and the taste is very clean. No bear/bread/yeasty flavors. If you have any other questions feel free to ask and I will help any way I can. Some of the other people in here are also very knowledgeable sources and great contributors.
Welcome to the forums! I use Ale Yeast in all my soda, so far Muntons ale yeast and Nottingham, Both have turned out excellent and tasty with good carbonation.