Something that isn't run of the mill? Olive python. Don't get turned off immediately just because they are "brown-ish", they are a top tier and unique species. Give olive pythons two hours of your time and you just might fall in love with them.

Boelens can get some nice size to them after some years, but still comparable to coastal carpet pythons. I think coastals are overrated with regard to how "big" they get, and on average it seems that the adult boelens I see are bigger than practically all coastals I see. There are issues with acquiring boelens of course, mostly availability (and almost exclusively captive hatched and then exported) and cost (3 grand or so?).

I've never heard anyone call BCCs "run of the mill", considering that known localities can command half a G or more in price for babies. They would be a top choice for me if I wanted a larger snake. Suriname, Guyana, and Peru localities are what I'd be interested in. Pucallpa BCCs are gorgeous, especially the high yellow ones, but Iquitos are a favorite of mine.

Red blood pythons are the bomb, but you are either into them or not. My girl is somewhere between 1-2k grams and an absolute sweety, my favorite to handle.