Welcome to the Q&A Forum

Hi Chris, Rand, Travis, Zippy and all the fans-moz,

In our agency we have very good results in some sites only with quality content, but ... but only on websites with easy competition and also for the quality of content, are gaining natural links (as it should be :)) .

My answer to the question "Is it possible to have good SEO without links and with only quality content?" is: yes and no.
You can only do a good SEO with quality content that these contents are slowly gaining good links.

My answer to the question "Is it possible to have good SEO without linkbuilding and with only without quality content?" is: YES
The link building is a dialogue and not a single order, the link building is an alliance of mutual benefit rather than a purchase.

...great

The keywords should be located as close to the domain.
Ideally remove URL category to leave the "clean" URL.

• www.site.co.uk/cancer-compensation
• www.site.co.uk/breast-cancer-misdiagnosis-claim/

Good luck ...

Is it possible to have good SEO without links and with only quality content? Have you any experience?

As Matt Cutts repeated several times, Google is smart enough to recognize when it comes to a domain, and in this case you will not be penalized. The problem is that the same Google will choose a main content (only one of the three), and the other will not look, that is, you will not be positioned.
The quality work means creating quality content and original. I guess that although the three countries speak the same language the texts should not be the same.

I think the issue of hiring a SEO agency is like real life, it all depends on what my objective value. 
I also paint my house but if I want a professional job I call to a painter.

..greetings Alex