Lionel Messi say there are lots of best players in the world based on how you view it but from my view in La liga it is Luka Modric, EPL it is Sadio Mane, Bundesliga it is Joshua Kimmich, French Ligue one it is Neymar jr and Serie A it is Cristiano Ronaldo.
This is how I view football, people might have their different levels of watching football, so I chose mine and they will choose theirs. The best in the world right now , I don't know because so many have been doing well. Also that one is difficult to answer.