Yes, as mentioned, I do love the idea of a sculpture on demi if you are investing in new vs recycling/using existing items. Sculpture would get my first vote--IF you find the right scale etc. The image above is nice relating to your picassos but agree w/lynartist it's dimensions seem too narrow for the "fill" factor need. Will be perhaps a challenge to find sculptural that is tall and right width to fit on demi. But, that is the fun of the hunt! There are metal luminary type candle holders that might be nice option too. I will post pic of concept in a bit.
Re: BAR CART. Regardless of your function need, I would "style" decor to fit the purpose of a bar cart. No vase or pottery vase, no branches. Use the crystal obelisks as your "ht" but does not distract from other crystal decanters etc. You have many console/demi/chest type arrangements on your main living floor, so a different approach to styling the bar cart is in order (imo, of course :).
Q