I made a custom swing sound for Phate3's Dragonslayer. It's cool that
each weapon can have its own swing and impact sounds I guess. I used the large weapon swing from DeadlyReflex and modified it a bit in Audacity to make it sound like you're swinging a very large hunk of metal. It won't replace any vanilla sounds, this gives the Dragonslayer its own swing sound (new sound record).
Preview Video:
You need Phate3's Dragonslayer (two handed axe animations version NOT supported, download a two handed sword idle replacer like this one if the vanilla idle bothers you) for this to work. When asked to overwrite the .esp, click Yes.