None worked properly for me, I tried all models. I ended up with the Sigma 150-600 contemporary so that I could use the Sigma teleconverter.
Teleconverters I tried with the tamron without success :
Sigma 1.4x DG
Sigma tc-1401
Kenko 1.4x dg
Kenko 1.4x dgx
Tamron 1.4x
Nikon tc-14e II (tab filed so it would fit non Nikon lenses)