MY favorite burger in TV is at the Saddlebrook Softball complex $3.00
Nothing fancy but always tender, juicy and tasty.
Other than that I've had burgers at Toojays, McCalls & Marguerita Republic and they're ok. I especially like the Patty Melt at Marquerita
and by the way, I pretty much feel the same as you on Johnney's
There was an old thread on this about a year ago - don't know if it's still up but you could search on 'hamburger'.