By the way, back to the question, I agree with Dan. While BIAB may want to stray from E as the root, I don't think it is any more or less likely than if you could have written the chord without the slash root. If the chord is to be held a while, you could experiment with E as a pedal tone. You could also do some fudging to increase the likelihood the bass stays on the root, such as to use Em, select Simpler for that RealTrack, and then freeze the bass part.

I also had a 'chord namer' program spit out G13/E. The choice between that and G7/E would depend on what the more 'important' upper tone is, the E or the F.

This was today's fun question.

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.