So, to summarize the thread so far:
Consensus:
np.nanmean()
np.nanstd()
np.minmax()
np.argminmax()
Vague Consensus:
np.sincos()
No Consensus (possibly out of scope for this topic):
Better constructors for complex types
I can probably whip up the PR for the nanmean() and nanstd(), and can certainly help out with the minmax funcs.