Feature Request: Legend Placement Issues

It is difficult to fully customize legend placement. We would like the ability to:

-Place the legend in the corner of the plot. Currently, QLegend.alignment doesn't accept more than one flag.

-Place the legend over the plot instead of next to it and fully control its placement. It should be easy to place it in any corner or just inside the center of any edge.

-Have Qt determine the best location for the legend based on the plotted data, i.e. something equivalent to matplotlib's "loc = 'best'"