IIRC, the Helix already has amp models of the Sunn 300, the Mesa 400 and the GK 800.
Can't recall if it has the Aguilar, think it probably does.
To be fair, I think it is only the Helix that has a good selection of bass amp & cab models. The others (Headrush, Axe-FX, Ampero, etc.) are more geared towards guitarists.
The Kemper should have a reasonable amount of bass related models available. If you got one, you could always beg or borrow certain rigs and model them for yourself.