You think probable to beryllium.
High density, High melting point, Nonreactive
Tungsten is the element with the highest melting point of any pure element, at 3422 degrees Celsius. It is commonly used in applications where high temperatures are involved, such as in light bulb filaments and high-temperature furnace components.
Sodium?
The element nickel has a melting point of 1455°C (2651°F). At this temperature, solid nickel transforms into a liquid state. Nickels high melting point makes it useful in applications requiring heat resistance, such as in the production of stainless steel.
Mercury is a transitional metal. It is the only metal that is liquid at room temperature.
Tungsten, a metal with a very high melting-point.
This element is wolfram (W): 3 422 oC.
One substance that has a high melting point is diamond.
Beryllium is not only a stable light metal but also comes with a high melting point.
it has a low melting point
Since Osmium the most dense element has a density of 22.59 g/cm3 but has a melting point of 3033 celsius, and tantalum hafnium carbide a superalloy which has the highest melting point of 4215 celsius but only a density of 14.65 g/cm3, there seems to be no relationship, however since pressure increases temperature one would think the denser an object the more resistant to melting that object would be, so it would be linear and therefore have a predictable relationship. It clearly does not. There is no relationship between density and melting point
All metals have different melting points but they are all high