TBH, a
is gunna help you more vs Vlad than an executioner's calling.
Item is overrated vs Vlad.
What you have to worry about with Vlad is him 100-0ing your squishies when CR is up. An item that stops him from 100-0ing you AND lets you lifesteal off of him after? Now that's money.
Other champions you mentioned are much more heavily affected by GW.
I'd much rather you spend 800g for 10 AD and a marginal, short-lived decrease to my laning power (I'm not all-inning or letting you all-in me during laning. Ever.) than something that would allow you to bulldoze me, like MR or another longsword or two.
I'm much more afraid of 20 more damage on autos, and 30-80 more damage from a non-ult combo than I am of the 20-50 healing you'll be reducing before level 9. Srsly, GW vs Vlad early is a trap. The pressure you get from more AD, or even just a hexdrinker+mercs (MS/MR are op vs vlad early) is MUCH greater than the marginal decrease to healing. The healing decrease is only more useful if you already have a lot of pressure on him...in which case you don't need it anyway.
Again, this is in regards to Vlad, not the more sustained/on-demand healing that other champions usually have.