Conchies http://www.rowanlearidingschool.co.uk/about.html out by Carnoustie
The Grange Farm, also known as Longpark, which is just off the Arbroath Road - though it's possibly being redeveloped in the future.
Murroes - right near Kellas, often has a long waiting list though.
Jim Nichols - along Duntrune direction.
There is a wee place Latch and Braeside which is nice too, I think the guy that runs it is called Willie Beatie, could be wrong.
Balmydown is along Strathmartine direction
Jo Wilkie has a place outside Invergowrie - Westbank https://www.facebook.com/WestbankLiveryYard
Inchcoonans - nr Errol
Carlogie - in Carnoustie
That's all I can think of just now, sure there are a few more I've forgotten!