Look into the Liasis genre. I been obsessing over these myself and probably going to be my next snake.
Macklot's pythons are a nice medium size from what I heard (6 - 8 ft) and the main subspecies of olive python is quite big (8 - 13 ft) but not gigantic like a mainland retic. Their care is supposed to be quite straightforward as well. If there's one con, which may not even be a con for some people, is their food aggression, which is supposed to be just as intense as a retic.
There's also white lipped pythons (6 - 9 ft) if you're feeling adventurous and can provide humidity for their rather thin skin.