#2. Shinsuke Nakamura
Shinsuke Nakamura won the United States Championship back from Rusev at The Royal Rumble, but merely two days later The Artist was defeated by R-Truth on SmackDown Live. It could be argued that this is WWE's punishment for Nakamura not signing a new contract with his current one set to end later this year but that is currently unknown.
Nakamura has definitely been on a decline since he was promoted to the main roster and despite winning the men's Royal Rumble match last year he was unable to defeat AJ Styles on a number of separate occasions to become WWE Champion.
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The Artist has since been stuck in the mid-card where he has battled for the United States Championship for the best part of the year, despite proving his worth throughout his time in NXT as a former two-time Champion.