Patrick Robinsons series based around his Arnold Morgan character - the writing is as good as Clancy (very similar actually) but the plot of all his books is based on post-CW naval warfare. There's enough extra-marital affairs, cringe-worthy intimate scenes and character study to be a very entertaining thriller series.
The guy did the biography of Sandy Woodward (commander of the RN Falklands Taskforce) and he was an advisor for the series (and a homage character appears in a lot of the novels) so it's based around relative facts.