#3 AJ Styles (Win record: 88.8%)

The Phenomenal One clearly had a phenomenal 2018.
Entering the year as WWE Champion, AJ Styles retained his title against Shinsuke Nakamura at WrestleMania, Rusev at Extreme Rules, and Samoa Joe over the summer.
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Despite losing the WWE title to Daniel Bryan on the go-home show for Survivor Series, Styles has notched up wins in 127 out 141 bouts, and with four draws. He ends the year with an 88.8% win ratio.
The question for Styles now though is, what's next? After losing the title to Bryan, as well as their rematch, it seems Styles is out of the title picture for the time being, with his contract also coming to an end in 2019.
If he chooses to re-sign, Styles will no doubt be just as impressive next year.