I looked up the numbers (reported) from Ourlads.com. Here's assuming they have the correct lineups. Oklahoma is a little tricky to compare against Georgia and Alabama, because they both run a 3-4 defense, and we run a 4-3 defense. For head-to-head comparisons, I pushed Ethan Downs back from the line to give Oklahoma a 3-4 defense.
Georgia
DLine - 297
LBs - 241
Total D Front - 265
OLine - 320
TE - 240
Alabama
DLine - 307
LBs - 241
Total D Front - 269
OLine - 319
TE - 257
Oklahoma
DLine - 297
LBs - 241 (Counting Ethan Downs as a drop-back LB for a pseudo 3-4)
Total D Front - 265
OLine - 311
TE - 255
Oklahoma
DLine - 289 (Counting Downs as RDE for the base 4-3)
LBs - 233
Total D Front - 265
DL Comparison
Georgia - 297
Alabama - 307
Oklahoma - 297
LB Comparison
Georgia - 241
Alabama - 241
Oklahoma - 241
OL Comparison
Georgia - 320
Alabama - 319
Oklahoma - 311