I love playing weird or bizarre champions in a lot of different roles. In the jungle you could probably play 90% of the champions if you are playing them smart I've seen someone make Braum AS jungle work and it's actually sleeper OP.
I've made stuff like support Darius and Volibear work, however you should have permission or a premade partner or team. Currently I see everything getting played on the ADC role Ziggs and Morde are the classic picks here but just try for yourself and see what works, I've had a lot of success with Veigar APC and its actually super legit, you can farm your AP stacks easier and Veigar has absurd lategame damage so you can open up your team to have more AD.
As for builds I love building AD on support champions, you guys should definitly try Soraka AD toplane. You'll be surprised with how good it is. And as I said full AS Braum is crazy strong. Build a Trinity Force, Wits End and Static and you'll melt everyone.