Coleman has been an integral part of the Everton side, which is on an incredible run in the Premier League; they've only lost one in their last 15 games.
The right-back has blossomed at Goodison Park since Roberto Martinez replaced David Moyes at the helm in the summer.
He's a constant threat down the right flank, providing assists, scoring goals and working hard defensively. In fact, on form, you'd be hard pushed to find a better full-back than Coleman in the Premier League.
So why has he slipped under the radar? Is it because he's not a "glamourous" name like Baines or Shaw? Is it just because he plays for Everton?
The simple answer to those questions is nobody knows.
He has been extremely consistent this season, and there's no reason why he shouldn't be looked at as one of the best full-backs in the league.
Maybe everyone has been distracted by the excellent form of some of his team-mates, like Ross Barkley, Gareth Barry, James McCarthy and Romelu Lukaku, but Coleman's own contribution shouldn't be underestimated.
He's already scored five league goals in 22 league appearances this season, which isn't a bad record for a right-back. He has created a lot of chances for his team-mates, too.
Martinez likes to play an expansive style of football, which allows his full-backs to get forward and provide an attacking threat.
In turn, that's allowed Coleman to show everyone just what he can do, and he's become a very important player for Everton.
After all of that, where exactly does Coleman factor in when it comes to discussing the best full-backs in the world?
He's very good at the Premier League level, but this is only really his first season as a first-team regular. Coleman's untested at a higher level because, with the greatest of respect, he plays at Everton.
However, if Everton manage to make themselves regular qualifiers for European football, Coleman's development will continue, and we'll see just how good he is against better quality players.
If Coleman keeps playing like this, could he earn a move to a team that regularly qualifies for the Champions League or the Europe League?
It's a definite possibility. Should he keep performing well on a consistent basis, then it's surely only a matter of time before a bigger club comes calling for him.
All of this brings me back to my original question: Is Coleman one of the world's best full-backs?
Right now, the answer to that question is no.
But he's one of the best in the Premier League, and he could very well be one of the best in the world in a few years time.