Right now, the CastleGrade G9 mask (replaceable N95 front panel with silicone skirt) looks to be the best combination of good fit/seal, replaceable N95 filtration, no valve - but there' might be something better on the horizon from MIT and Brigham and Women's with all the advantages above plus the wearer's face is somewhat visible through the mask.

https://news.mit.edu/2020/reusable-silicone-rubber-face-mask-0709