I would be surprised if you can loop any a/c with a high/T tail as at a certain point the airflow from the wings would interfere with that over the tail and produce a deep stall. (BAC 1-11 Cricklade, Wilts.)
Plenty of aerobatic aircraft with a t-tail, including gliders. And have personally seen some of those loop, including the Slingsby T53 with the ATC, so not sure that logic stands scrutiny.
According to
http://www.vc10.net/Technical/wing_shapes.html: "The VC10 is one of the few T-tailed airliners to have a natural tendency for pitching nose down at the stall, if not the only one. This was mainly due to the fact that the engine nacelles were comparatively wide and therefore started acting like a low-set tailplane in high angle of attack situations. A case was made for allowing the VC10 to fly without a stick pusher but in the end a decision was made to install one as an added safety feature to prevent the dreaded super-stall condition that caused the loss of the BAC 1-11 prototype in 1963".