Add left-step view
Charles Janet's left-step periodic table basically moves the s-block to the right side of the table and puts helium in the rightmost column. It looks very elegant and intuitive when considering electron configuration. For compactness, the f-block could still be displayed below the rest, or could be connected like in "wide" mode.
It would be an abuse of my status as the most popular periodic table website to promote or endorse alternative layouts based on my own non-expert, non-peer reviewed opinions about their legitimacy. The only layout I display is a mirrored version of IUPAC's official PDF.