Recommendations for 'upgrading' gravel bike with road tires?
&quot;whether it's a reasonable goal to try to make your gravel bike 'more road bike-like' with different tires&quot;
It is.
&quot;and how to achieve it.&quot;
By mounting a road tyre. That is all there is to it.

We can then get into long arguments between the proponents of Continental vs. Schwalbe, vs Challenge vs. Vittoria vs. Tufo vs. whatever...
It is not productive.
Take a a high performance road tyre and if you really need high performance, think about an aero road wheelset (or an ultralight one, if you mostly climb hills). That is, of course, much more expensive.