Steel I-beam club roost was cool, alloy ones are horrid tat still sitting NOS in nearly every shop's dark corners to this day (particularly their silly OS standard, 28.6?).
I think the cattleprod Syncros is a classic of function > form, brutally burly and totally reliable.
The Zooka looked great but thats about it, crack happy and expensive, but has to be a classic with those looks and enduring appeal.
A.TAC is definitely a classic, nice form, great function, little pricey but worth the coin.
Azonic Shorty is probably THE classic downhill stem, inspired hundreds of copies that never matched the original.