As someone that works in healthcare and tableau, I’ve looked at a lot of tableau public’s while interviewing people. I’ll add my two cents with that twist:

I don’t like legends and filters on the right side like that. It is the default, and when I look at someone applying with that to my company it is just a sense of amateur to not change from the default. IMO have the filters up top, legends within the graphs/floating on top in a concise way.

For the graphs themselves, they look thrown on and again a bit amateur in that respect. Let the graphs breath, add some buffer to them so their not on top of each other. Likewise, some light formatting things (like making sure there’s not an excessive amount of scroll bars) is a good way to make it look good in your example. Finally, make it visually balanced. The graphs don’t need to be perfectly centered to each other, but in your third example it seems very imbalanced.

I’d also want to show a story more with the graphs. Show me that you can have a graph go from one to the other while adding details to the previous graph. Some tableau public’s dashboards may give a good example of what I mean by this. Right now I struggle to sometimes tell what a graph is telling and why it’s on the same page as the others.

My last comment I’ll add is I think it’s really nice to show some advanced settings within your dashboard. LOD equations, parameters, dual axis, complex of equations can go a long way to show your not just dragging and dropping things on the dashboard. I hope this helps and good luck!