In the US hobby, for pure hissers we have:
Aeluropoda insignis
Elliptorhina chopardi
Elliptorhina davidil
Elliptorhina javanica
Elliptorhina laevigata
Gromphadorhina oblongonata
Gromphadorhina portentosa (Multiple pure strains/morphs now)
Gromphadorhina sp. "Unidentified"
Princisia vanwaerbeki "Androhamana"
Princisia vanwaerbeki "Big/Black"
Princisia vanwaerebeki "Tiger"
In Russia they also have Elliptorhina coquereliana, hopefully those will make it to the US hobby one day as well.