At 1Ramp, we are running contests for the last 6 months. We built the entire tool to host, manage, and declare results in a contest to make running contests easier for everyone on Steem. In this duration, we've hosted a total of 25 contest and distributed prizes worth more than $150.
If you've noticed, we are also maintaining a leaderboard on the contests page. This leaderboard is decided according to the total prizes the participants won in the last 10 contests.
Currently, the top 5 people on the contest leaderboard are --
#1 -- 
@barbarabezina
#2 -- 
@elikast
#3 -- 
@vibesforlife
#4 -- 
@norwegiansteem
#5 -- 
@rahesi
Please check out the entire list here: https://alpha.1ramp.io/competitions
You'll find some of the most active and popular creators on Steem in that list. Some special mentions who are constantly setting a higher bar for the contest entries are 
1Ramp for contest hosts
We are glad that 
Please let us know your experience of using 1Ramp to host your contests. We'd be glad to know if there is anything that will make managing contests easier. Please write your suggestions in comments and we'll implement them ASAP.
If you are new to 1Ramp, here some blogs that'll help you to learn more about us --
Contest creation is now open for all + Winner's Leaderboard. --
@bxute Read More
Reviewing 1Ramp's Competitions + App Updates. --
@jaff8 Read More
1Ramp - Building 1 Place For All Creative Communities on Steem. --
@the1ramp Read More