Best Original theme for discourse

It is possible to make discourse like total new forum / new cms etc

I mean to make such a look that it’s hard to guess that it’s a discourse
Do you know such themes?

You could check: #theme-full or maybe design your own “original” theme for your forum with this guide: Developer’s guide to Discourse Themes


Are they safe ? how can I make sure they won’t contain malicious code or unoptimized code?

Read the code yourself before you do a pull.