Tulsi looks interesting, however I don't know anything about it. I guess for now I'll stick with the common basics.

GARLIC
CAYENNE
OLIVE LEAF
CINNAMON
CLOVES
HORSERADISH
TURMERIC(actually curry powder with plenty of turmeric. I can't find decent turmeric cheap, just curry powder with turmeric in it. I know some have concerns about taking coriander, which is also in curry powder)
PEPPERMINT
CAMOMILE


As for garlic,

http://www.glenbrookfarm.com/herbs/garlic.htm
http://health.howstuffworks.com/medical-uses-for-garlic-ga.htm
http://www.garlic-central.com/allicin.html