Most Anaheims ive tried are pretty mild but there are some exceptions.
Numex Lumbre....very hot and thin walled...not good for much besides drying
Barkers X hot or XX Hot....a lot more meaty and pretty hot too
Sandia Select...meaty and a little hotter than a typical jalapeno. Mine were pretty mild but delicious
Big Jim Heritage.....normally not hotter than a jalapeno but occasionally you get a zinger
If i had to pick one to grow it would either be Big Jim Heritage or Sandia Select. Not the regular Numex Big Jim or standard Sandia if possible but they are good too.
Ive had hot wax/banana that were easily hotter than most jalapenos.