Winston
Smash Master
You don't need the jab though. If it's at the percents when nair grab works, just use nair grab or nair utilt. Eliminate the unreliable middleman.you jab so that they dont get knocked away by the nair. then u can grab and ****.
that's assuming they arent in cc percents.
but nair-> runn upsmash is neat as well
I mean, attempting to land a nair is already dangerous enough vs most characters. Don't throw in a jab there on top of that without good reason.