Many believe 98/98 was his best. Many believe 2001 was his best. I personally believe 2003 was his most dominant, whether he actually looked the best/most aesthetic or not. Many would agree with me, but we can't know how many "many" is. I don't think any stats on percentages on which year was the "right" answer have or will ever be obtained, so we'll never know. How's that?
The general consensus among the experts is 2001 ASC is his personal best and some feel the best anyone's ever looked , Ronnie has said 98 Olympia was his best on multiple occasions , 99 is seldom praised as his best showing , but a bunch of fans sure but not so with experts
and 2003

AMAZING but not his best overall by a long shot