Keith Law of the The Athletic (paywall) posted an article listing his Top 40 free agents. Springer, Realmuto, and Bauer were top 3. Most Met fans would be happy with any one of them. All positions of need.
Stroman was #4. Mets have until Monday to make him a qualifying offer. I believe they will, barring ownership complications.
Surprisingly, McCann was not listed. The only catcher listed other than Realmuto was none other than Robinson Chirinos at #34.
That list was expand once the non-tenders, of which there will be many, become official.