Here we go!
Hows about a N. veitchii x lowii:
Here's a trio of neps. N. 'Gothica', N. 'Black Dragon', and N. thorelii x TM:
N. lavicola with some N. ampularia 'Giant Red' in highland conditions!
N. lowii x ventricosa (or something):
N. clipeata (clone 2):
N. bongso, fairly new - will get almost black:
N. boschiana doesn't disappoint: