Sorry but other than Harper , Omoruyi, Mulcahy who else is a B1G type player from NJ.
It is rare that Rivals Top 100 players from NJ commit to B1G schools. Going back over the last 11 classes (edit: added in 2021):
6 - Kentucky
5 - Syracuse
2 - Villanova, UVA, Cincinnati, Ohio State, Florida, Auburn, UConn
1 - Rutgers, Seton Hall, LSU, Oregon, Notre Dame, Stanford, Marquette, Vanderbilt, Illinois, UCLA, VA Commonwealth, Georgetown, G-League
Conference (current conference, not conference-at-time-of-commitment)
12 - SEC
8 - ACC
7 - Big East
4 - B1G
3 - P12
2 - AAC
2 - Other
By year:
2021
69 - Johnson - UConn
2020
3 - Kuminga - NBA G-League
36 - Ware - Kentucky
42 - Omoruyi - Rutgers
45 - Abdur-Rahim - UVA
83 - Sanogo - UConn
92 - Lane - Florida
2019
8 - Lewis - Florida
14 - Whitney - Kentucky
15 - Antoine - Villanova
2018
21 - Reid - LSU
25 - King - Oregon
31 - Quinerly - Villanova
53 - Carey - Syracuse
70 - Muhammad - Ohio State
2017
17 - Richards - Kentucky
2016
33 - Battle - Syracuse
62 - Gibbs - Notre Dame
86 - Pugh - Stanford
2015
10 - Briscoe - Kentucky
35 - Richardson - Syracuse
69 - Purifoy - Auburn
77 - Diagne - Syracuse
90 - Carter - Marquette
2014
5 - Towns - Kentucky
53 - Delgado - Seton Hall
91 - Reed - Auburn
100 - Baldwin - Vanderbilt
2013
22 - Ennis - Syracuse
26 - Lawrence - Cincinnati
39 - Roberson - Syracuse
88 - Cameron - Georgetown
97 - Colbert - Illinois
2012
3 - Anderson - UCLA
76 - Tobey - UVA
99 - Johnson - VA Commonwealth
2011
3 - Kidd-Gilchrist - Kentucky
43 - Ross - Ohio State
81 - Thomas - Cincinnati