I think the issue is less in size than in numbers. Bringing in someone who is "Big" may not add any value if they don't fit into the current concept. With that in mind this team is already in excellent position in the front court for next year.

Aluma - Will use this experience to get better and more consistent playing against post players
Mutts - Same
N'Guesssan - A 6' 9" forward who will make major strides over the summer
Ojiako - Should get to the point where he plays regularly

There are very few programs that have this much size and athleticism in the front court.