The 295x2 only pulled off it's solution with both a fan on the card itself, a heatsink plate covering the card on the front and then a loud fan on the rad as well. And even so, it didn't pull great temps.
Well, aside from any temperature complaints, what you just described is the entire design scheme of hybrid cooling.
The idea that there ISN'T a fan on a card cooled with a CLC/AIO is rather alien, because the CLC is always dedicated to the GPU/CPU, it doesn't cover anything else. No matter what you do, on high performance cards, those other components on the card need cooling too.
Look at the Kraken G10, it has a fan. It does nothing about adding heatsinks or anything, it simply creates passive airflow.
Corsair HG10 is not nearly as universal, but aims to take the blower fan from reference cards and incorporate it into its cooler assembly for the same purpose, but it runs at a slower speed because it doesn't have to work as hard.
Having a fan on the video card is hardly an issue, these solutions don't require high speed fans, so long as the card still has some attention paid to passive cooling. Thus, a heatsink baseplate; my 290X Lightnings have them, and one of them has the G10 on it, so the VRMs and everything stay cool.
Don't forget that the 295X2 is a monster of a heat producer. It has two pumps for two GPUs, and a single regular-thickness 120mm radiator, and I believe stock has a single fan. That's hardly enough, so that fan has to work harder than it should, but it produces less noise than a capable air cooled solution.
Such a regular-thickness 120mm radiator is exactly what I have attached to my 290X Lightning, though I have a dual-fan setup. Overclocked to 1200 core/1500mem, with the fans hardly crossing 50% on the CLC, the temps are always 10ºC cooler, or more, than the same-specced stock card I have below that one, which can reach into the mid 70s. I don't hear the CLC cooler, and it's hovering around 60-65ºC. (this wasn't true with stock Corsair fans, those fans sucked. EK Vardar F4-120s are the bomb, a spiritual successor to the famed Gentle Typhoons that can be hard to find (around 1800rpm or so is a popular GT, the F4-120s are around 2100rpm max IIRC).