In my opinion, Bayern Munich's best player this year was clearly Harry Kane. It would be an unthinkable decision for Bayern to sell Harry Kane when he is this good and is supporting the team. I think the first player who should stay for Bayern should be Harry Kane. I'm sure Real Madrid is waiting in line if they want to sell him. It is not difficult to guess that he will be much better than Joselu there.
Bayern Munich might not be in form but they've the best set of players when comparable to Bundesliga pattern of game. Thomas Tuchel is doing his best to apprehend the team and their performance, the current problem or challenges looks bigger than the coach, he have failed to resolved the matter. Harry Kane is unarguably the best Bayern Munich player this season. He have bagged good number of goals and he's still scoring in upcoming matches. He's a fierce and complete attacker, no room for relenting efforts but always focused on the top job this season.