I am looking for any ploppable building, BAT, or lot that I can put in my city that fully takes care of garbage, hence, no longer needing to lay landfill zones
These plugins may suit you:
PEG Garbage Chute 2.05 (http://www.simtropolis.com/forum/files/file/4569-peg-garbage-chute/)
Garbage Disposal Center 1 (http://www.simtropolis.com/forum/files/file/19207-garbage-disposal-center/)