[@DocRock]: Classes can be whatever you want to spin up. Just ask, as the RP simply takes inspiration from and is not directly analogous to the aforementioned series.

As for the latter, I think that DnD Dragonborn are fine, though if you ARE adapting a sheet I'd recommend:
a) a change of name for the race so as to avoid confusion/theoretical in-world copyright, as well as a more straightforward explanation
b) actually filling out the form given in the OP and making sure that you aren't just straight listing or copy-pasting information thereof. Not everyone will have played DnD (*coughcough*) and directly porting everything may have some adverse effects in terms of... Well, things being stacked in the characters' favor.

Honestly, the best way for my co-GM and I to analyze a form is to see it first, so... Yeah. That.