C'mon happy. You can't expect me to let you get away with some of those names being greater than ET as a centre. I'll bold the ones that I'll give you.
**Reg Gasnier, Meninga** , Miles, **Cronin, Rogers**, Lawrence, **Renouf, Inglis**, Hodges, **O'Connor**, Gary Schofield, Mark Gasnier, Mark McGaw, Cooper, Chris Close, **Steve Ella**, Tony Currie, Kevin Iro, Dale Shearer, Harry Wells, Brett Kenny, **Ellery Hanley**, Peter Jackson, Reuben Wiki
ET was a better centre than the rest of them and I'd go as far as saying that Lawrence, McGaw, Cooper, Close and Jackson are laughable suggestions (all good players of course, but better centres than ET? You are having me on friend).
Shearer, Kenny, Schofield and Wiki are arguably all better players than ET but none of them are better centres. So from your list Gasnier, Meninga, Cronin, Rogers, Renouf, Inglis, Ella and Hanley are/were better centres than ET imo.
But opinions mean nothing so don't lose sleep over it.
Edit: Upon a little research I've decided I'll give you O'Connor too. I was unaware that he was so revered by there you go. Anyway ET was a two time Dally M Centre of the Year in some pretty outstanding years.