Roritoro CR1080 is one of the smallest ATX cases you can buy and is inverted ATX. Personally I think it looks kinda meh, but some people like it.
be quiet! Dark Base 900, it's kind of an old case too though from late 2015.
Silverstone makes the LD01 which looks pretty sweet but it has a blocked off and solid front panel so airflow would suffer.
Lian Li PC-O12 is kind of
inverted (completely scrambled is a better word) but it looks sweet if
you ever plan on going with a loop. it looks kind of goofy if you're sticking with air though.