I tested and used the same Eleven modern Pop Rock style you used in your project for the Spencer Davis Group song. RT2591 is the RealTrack Bass included with that style. I imported midi data of the bass line for "Gimme Some Lovin" and used Playable RealTrack Feature to play the accurate bass line for the song using the sound of the RealTrack 2591 from the Eleven modern pop rock style.

I also used that midi data using sounds from the Timbres of Heaven. "Timbres of Heaven is a General MIDI (GM) and General Standard (GS) SoundFont that enhances the quality of MIDI playback by providing high-quality instrument samples." (ChatGPT) ; I tested with the Coyote default BIAB synth, and a Bass Hi-Q instrument also.

There are a lot of options if you import midi data to play the bass riff from "Gimme Some Lovin"

BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.