You can also have multiple visualisations inside a single <panel> element, i.e.
<panel>
<html>
</html>
<single>
</single>
<single>
</single>
<chart>
</chart>
<table>
</table>
</panel>
The way Splunk lays out such structure inside the panel is that <single> elements are aligned horizontally, but others will then alighn vertically.
I often will avoid using a single panel viz, which offers limited customisation and instead use and HTML section with the contents coming from tokens calculated from searches.
The top three 'rows' of your example panel, i.e. total, value, expected, above... could be a single HTML block where you can write the data from tokens and then a timechart can sit underneath.
Depending on how good your html/css skills are you can do a huge amount to vary the style.
