Most Popular Users in 2015

Name the users which had their own quizzes taken the most in 2015. To make it easier, I've added one of their quizzes as a hint.
Quiz by relessness
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Last updated: January 24, 2016
First submittedJanuary 15, 2016
Times taken31
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Times Taken
Quiz
User
686,710
Countries Closest to the US
relessness
487,586
États des États-Unis
punkfrancais
415,771
Countries of the World - One Minute Sprint
Jerry928
330,807
Countries Breakdown Puzzle #1
kiwirage
256,791
Fast Typing A to Z
johnnyaitch
199,173
Disney Animated Characters
CBTemple
188,413
Five Most Populated Countries by Continent
Quizzer6794
166,293
Fast Typing Test - 100 WPM Challenge
ThirdParty
135,042
Countries That End in Y
LBA
131,301
Digits of Pi
kalbahamut
124,572
12 x 12 Multiplication Table in 2 Minutes
scambigol
108,292
Mean Girl Quotes
Kquilikquiit
95,244
Band Names by Synonym
MattPunk
87,592
Estado de los Estados Unidos
punkEspanol
86,368
Country Boggle
Geoguy
86,204
Answers Begin and End with the Same Letter
buck1017
82,055
America's Least-Educated Cities
geoPunk
78,117
Countries with Nuclear Weapons
mac212121
69,123
Les 151 premiers pokemon en français
katsudk
68,894
Hauptstädten der Welt
deutschPunk
+1
Level 74
Jun 17, 2016
Congrats on hitting 2 million!
+1
Level 47
Jun 18, 2016
I try!
+1
Level 73
Jun 20, 2016
Send your answers to the jetpunk users quiz at gin@scambia.it please - thanks for participating! Depending on how many more I get I will either make a sequel or update the first one
+1
Level 47
Apr 11, 2020
???