well ... there are still so many choices.
Libraries like ELY [which is really excellent], is a broader curved shaper. Nonetheless ... very effective.
I do avoid saying, you gotta buy this or that EQ plugin. For specific reasons.
To that, there are 'specialized' EQ's that have been favored with mastering work. Scarlet, Green, Ivory are a few Acqua candidates of the 'clean, not sterile' persuasion.
But there are plenty of Nebula libraries ... some considered more from Console EQ's ... S*L, N**e ... even A*I. AlexB's 4K-eq is one I pulled up last nite on a mastering session, in particular, the Hi/Low pass filters. I even pulled in a mid-range boost, and low-mid cut preset. It might not be considered a 'mastering equalizer' ... but I was quite happy with the result [and control]. I still needed some Q control in the LOW band, so had to call on another library.
Here is the point ... with NEBULA, many libraries contain a 'clean' or 'non-harmonic' preset. It might be assumed that these are of lesser quality, or not preferred ... but that would be FAR from the truth.
Many many times, the 'non-harmonic' presets will be the majority that I call in on a session. On the other hand ... I've also had sessions that were overwhelming 'harmonic' presets. This is what I like about Nebula design ... custom harmonic/saturation choices by the engineer based on the projects needs or taste.
That said ... now you have even more options
and is why difficult to suggest this one or that
maybe I didn't help how you hoped
i7-5820k, MSI X99A Plus, 16 GIG Ram, Noctua NH-D14, Win-7 Pro [64-bit], Reaper-64
NVC [Nebula Virtual Controllers]