Best way to raise pH without alkali metal?
Tetramethylammonium hydroxide

This is a strong base like NaOH.  

See Behavior of Polyethylene Oxide Based Nonionic Surfactants
in Silicon Processing Using Alkaline Solutions J. Electrochem. Soc. 1995   volume 142, 621-627:  


  alkaline cleaning solutions based on quarternary ammonium hydroxides such as choline ($pK_b = 0.1$) and tetramethyl ammonium hydroxide ($pK_b = 0$) 


and Ceramic Nanomaterials and Nanotechnology II which says:  


  In this research, tetramethylammonium hydroxide (TMAH) was used, instead of KOH, to adjust pH of the precursor solution to 14.0 


Also, TETRAMETHYLAMMONIUM HYDROXIDE Journal of the Chemical Society (1905): 


  An estimation of the strength of the base by means of the velocity
  of saponification of methyl acetate in N/80 solution showed that it was
  somewhat weaker than sodium hydroxide. The velocity constants obtained at 25 [degrees] were 0.0106 and 0.0115 respectively, so that if the
  strength of sodium hydroxide is represented as 100, that of tetramethylammonium
  hydroxide, under the above conditions, will be represented by 92.