If you're looking for an arranger that follows regular piano playing without freaking out the chord recognition, IMHO the Roland BK series excels at exactly that.

It has a mode (Pianist2) that waits for at least three notes before changing chords while the sustain is up (pretty standard mode on most arrangers) but adds the wrinkle of needing FIVE notes actually played while the sustain pedal is down. I can't tell you how much that radically improves how easy it is to play fairly pianistically without freaking out the chord recognition!

If you can live with a 76, the BK-9 might be the perfect gigging keyboard, the basic meat and potatoes comp sounds are killer, and its Hammond clone is arguably the best in any arranger too. 21 lbs for a really nice feeling 76 with drawbars is a plus, too!

Keep your eyes open for a used one...

But if you want full weight piano keys, you might want to look outside the arranger segment, TBH. There's some quite light WS's that can do some basic chord following and have some cool drum loops in there, but aren't really full arrangers. But if your main need for it is live band, you got to ask yourself how often you think you'll be turning on anything? Most of my experience playing with real players is, don't piss them off by showing how well you can replace them!

Sure, it's nice to have some drum loops in case you want to rehearse without a drummer, or even gig without a drummer if volume is a concern, but things start to get a bit tense as you add in extra parts that would traditionally be played by your guitarist or bassist or horn player..!

I make a point of having keyboard registrations set up for live band use that have no style or SMF parts switched on, so I can't 'accidentally' turn on the auto stuff! Wow them with your playing, not with the technology...