I'm not sold on JE at the 4. From the 5, he doesn't pass back out well and holds the ball too long. From the 4, he does those two things also and you can add his scary dribbling. Mo fouls way too much to get serious minutes and AM is not a good matchup with more mobile centers. What little I remember of JE playing the 4, he also stayed pretty much around the 3 pt area.
I like TW, but he too has some bad matchups. Where that's not a problem, he does quite well I believe. DG is not a scorer at this time, but it looks to me that he could give a solid 7-10 minutes per game at the 4.
This team has reasonably good depth. Sometimes, it a matter of matchups. Other times, it's finding who has the hot hands and/or energy. Outside of JE, maybe JB, I'm not sure we have a "starting 5".