Chou Denji Machine Voltes V

These two shows are among the best of the old school of super robot shows. They both have interesting characters and fairly interesting ongoing plotlines behind their episodic natures. 

Both of them are exceptional super robot series of the 70's that every fan should watch! 

Both are classic anime about groups of five smaller robots that combine into a bigger one and fight enemies. 

Another series by the same director, Tadao Nagahama. Both shows share the major theme of revolution, and both feature plenty of melodrama, swordfights, horses, frilly dresses and crying. 

another installment in tadao nagahama's mecha trilogy, i grew up with these in the PI, anyway daimos is more focused on romance of a romeo and juliet type of nature as opposed to voltes v's team-based good vs. evil plot, both are great and still intact is nagahama's own style of old-scool mecha action. 

Both from Tadao Nagahama's "Robot Romance Trilogy" Voltes V has been compared to Combattler V for having extremely similar storylines, mecha design and characters. Voltes V is definitely an improvement on Combattler V in terms of story telling however.