QGIS User 0039 - Landsat 9

Using multispectral satellite data from Landsat 9 in QGIS to create color imagery of high quality.

Also try a virtual raster for R-G-B and then the processing tool GDAL-Pansharpening to enhance it with the pancromatic band. A bit more complex, but in most cases it will get you a better result.

https://earthexplorer.usgs.gov/

Want to learn more about Landsat 9:
Landsat 9 At Work