Cash:
Patrik Antonius
Mikael Thuritz
Sami Kelopuro
Johnny Lodden
Erik Sagstrom
BldSwtTrs
Tom Dwan
Viktor Blom
Ilari Sahamies
Phil Ivey
Phil Galfond
both Dang brothers
Randy Lew (Nanonoko)
Brian Townsend
Cole South
Prahlad Friedman
Taylor Caby
Dan Cates
Ben Sulsky
David Benyamine
Would add these cash players if you're looking at pure impact on the economy and/or people who have a bit of shadiness:
Guy Laliberte (impact on economy)
Gus Hansen (impact on economy)
scout326/scout315 (impact on economy)
Brian Hastings (2x shadiness)
Mohamad Kowssarie (possible super shadiness)
Isildur1
Trueteller
Jason mercier
Moorman
Sauce
Phil Galfond
DURRRR
(The Guy That Said) I Won't Million
Sami (LrsLzk) kelopuro
KPR16
ChaoRen
josio
Dan(jungleman) Cates
Ole(WizoWizo) Schemion
Johnny Lodden
I nominate sauce because he's been playing high stakes since like 2006 (with a short break), has been one of (if not the) most feared players in both NL and PLO, maybe the only person in recent years to be considered top 3 in both at the same time, now plays mix games too, has contributed a lot to forum strategy, and is one of the few long-time big names who hasn't been caught doing something unethical.
For actual fame I'm sure there are bigger names, but just for consistency and skill I think he should be in there
Chad aka lilholdem954 who recently passed should go in there, one of the first online mtt legends, anyone who's been around awhile that plays mtts will know how much of a beast he really was.
Cash:
Patrik Antonius
Mikael Thuritz
Sami Kelopuro
Johnny Lodden
Erik Sagstrom
BldSwtTrs
Tom Dwan
Viktor Blom
Ilari Sahamies
Phil Ivey
Phil Galfond
both Dang brothers
Randy Lew (Nanonoko)
Brian Townsend
Cole South
Prahlad Friedman
Taylor Caby
Dan Cates
Ben Sulsky
David Benyamine
Would add these cash players if you're looking at pure impact on the economy and/or people who have a bit of shadiness:
Guy Laliberte (impact on economy)
Gus Hansen (impact on economy)
scout326/scout315 (impact on economy)
Brian Hastings (2x shadiness)
Mohamad Kowssarie (possible super shadiness)