What is the best type of cake to be covered with fondant?
Hi and Welcome to CC, Brandyshark.
Probably anything but Angel Food... (Although that would be possible, just not as easy.)
Everything you need to know to make, decorate and assemble tiered/stacked/layer cakes:
The above super thread has popular CC recipes for crusting American buttercreams, several types of fondant and doctored cake mix (WASC and other flavor variations) - and so much more!