Nasser.
No way Flex could beat Ronnie.
Had Flex been in condition in 98, he might have won...Ronnie came in condition, Flex didn't, and Flex couldn't count on his "shape" to save hm this time.
Flex knew Ronnie was capable of beating him, it happened in 96, so Flex thinking he could waltz in and just take it, was a stupid notion.
On prophetic cartoon appeared in M&F that yr, it had Flex, Shawn, Ronnie, I believe Kevin and Nasser all fighting for the
Mr. O (really grabbig for it), and how did the placings turn out?
If anything, Flex had more #2s than Nasser did, and according to the Musclemag rankings at the time, he was ranked higher.
Also, Nasser was dominant during the Dorian era, not so with the Ronnie era, although capturing the AC in 99. had Flex not gotten sick, he'd last as long as Ronnie and still be #2, as Cutler didn't have Flex's shape nor back.
The objective and subjective answer to the OP's question would be Flex.