hey,
good list so far. i would buy any of these motown artist: diana ross, marvin gaye, 4 tops, temps, smokey and stevie. there are may others but i believe the man did his best stuff with them.
i would add to your list:
for once in my life: stevie
standing in the shadows of love: 4 tops
reach out (ill be there): 4 tops
im gonna make you love me: temps
how long has that evening train ben gone: diana ross
cloud nine: temps
aint nothing like the real thing baby: marvin
aint no mountain high enough: marvin and diana ross versions
darling dear: smokey robinson version
special occasion: smokey robinson
whats happinin brother: marvin
flyin high in a friendly sky: marvin (demostrates nice walkin)
save the children: marvin (end of tune is smokin!!!)
god is love: marvin
your my everything: temps
i second that emotion: smokey
point it out: smokey
my guy: mary wells (upright at end of track is unbelieveable!)
home cookin: junior walker (hard to groove but if you work enough on it it will lock in)
heat wave: martha and the vandellas
how sweet it is to be loved by you: marvin
i heard it through the grapevine: marvin and gladys knight and the pips
hope this helps. ive learned all of these and the songs on your list. it takes time, but it really really really pays off. now if i could only learn when to use it at the right moment
peace,
evan