It's a great rule to have to protect your technique while you're developing it, however, not using your thumb is purely technique oriented and that "rule" can be broken anytime it inhibits the technique which it's trying to protect.
So ask yourself this, "if I don't use my thumb for this chord, will my technique be better or worse?"
If not using your thumb causes a certain chord to require your fingers crossing in an unnatural way (IE your 4th finger in between your 1st and 2nd and your fifth finger on the opposite side) then chances are you will actually do more harm to your technique if you don't use your thumb.
More times than not, pull everything except the end of your thumb away from the neck, but in scenarios where your technique is worse off to not use your thumb.... use your thumb =)
On a side note, your second to last has a five chord where your leading tone (F# or High E's 2nd fret) doesn't resolve itself. Leading tones, especially in dominant chords always want to resolve up, even in deceptive resolutions based on a six they still move up. In this case I can see it wanting to move up from the F# to the G in your IV chord (High E's 3rd fret)