Well I don't think I have a problem with my temps any more.....
Since I got the kit to fit my Noctua U12F, I was going to do my own little comparison.
However the back bracket wouldn't fit and I couldn't be bothered to take a angle grinder to my case.
Therefore it was just down to the GX-7. Hopefully I've put the right amount of paste on this time...

Results with 1 fan and before I got some proper TIM cleaner.
Results with 2 fans and the cpu and cooler meticulously cleaned. Getting better
Final temps, acheived by changing the voltage from 1.325 fixed to +0.45 offset and dropping the load line calibration from 1 to 5. With these settings I never saw the vcore go above 1.320 and most the time it was between 1.296 and 1.304.
I have to say I am more than happy with these results and I don't think the bigger and more expensive Silver Arrow and Noctua NH-D14 would perform much better.
So the GX-7, with one fan and same bios settings dropped the temp from 86°C to 73°C, a bit of cleaning and an extra fan dropped another 6°C and improving my bios settings another 4°C. Altogether a whopping 23°C improvement
Thanks for your help and suggestions all
Slack