What would you create?

Hypothetical scenario.

You start level 5, and you rolled for stats and lucked out, you got an 18 to place somewhere, allowing you to reach a 20 in a specific ability score already. No free feats at lvl1 allowed.
What are you creating as a character? All sources, including current UA stuff is available to you!

I love Colby's build ideas and sometimes wonder what this community has in their heads! Let me know about your favorite builds, optimized for anything you'd love playing :)