Might want to take a look at the advanced stats on these guys. They don't have the same games but their effect on a team is about a wash. And MJ is easily the better rebounder. JCL is also an inefficient scorer even though he is a better outside shooter. And Harris is also very inefficient player. To even suggest that Harris will be just as good of scorer as Haliburton is head in the sky thinking.
If Harris is eligible and they get Smith I don't think the Freshman will be very impactful because there won't be enough minutes to go around. Jackson, Harris, Bolton, JCL, Johnson, Smith, Young, Conditt before you get to the Freshman.