...I had a cedar bodied Roscoe for a week that did the same thing....I was miserable with that bass as well
I hear you there. I've tried many different brands of pickups in my Fenders over the years. It's amazing how one brand/model can yield lackluster results, and another brand/model can turn the instrument into something really special.
I still have my Roscoe with a spanish cedar body. It has Roscoe's Bart pickups and a 3-band preamp. I do like it's sound overall, but I'm not sure if the bass would benefit from a preamp swap. It's Bart preamp tends to be noisy in a few of the clubs I regularly played at. No big problem at this point, as I'm not in a band at this time.

But now that I've compared my Roscoe's sound to my Ristola's I feel the Roscoe sounds like it's electronics have a greater effect on it's tone than the OBP-3 in my Ristola does.
-Granted, I pretty much leave my Ristola's eq set flat, and make very slight eq adjustments: As I'm sure you know, the OBP-3 can get super aggressive in a big hurry.
...My favorite combos so far have been:
alder body/ebony board
mahogany body/ebony board
cherry body/kingwood board
(all with maple necks)
You know, other than the cherry/kingwood combo, I presently own basses with the other body wood/fingerboard wood combos. IMO the alder/ebony combo is a really nice pairing; I have a Jazz Bass with an aftermarket neck with this setup. That bass was my "main squeeze" for almost 10 years.
....The mahogany/ebony combo is still the combo to beat. If I had the money I would have Brian build the three combinations above with the same pickups and preamp and I'd pick my favorite as the keeper. Maybe someday.....I think I could even narrow it down to the mahogany or the cherry bass really.
My Alembic Europa is a mahogany/ebony combo. Even though I rarely play my 4-stringers anymore, it would be very hard for me to sell it. It's a very good sounding bass in my book. When I was spec'ing my bass with Brian, I really agonized over an alder body or a mahogany body.
....As long as the contruction is sound these will all yield a warm, solid and very responsive instrument with just enough attack where it's not too bright. From there you pick the pickups and preamp to taste.
+1. Andy, this is also me 100%. If I stay on the road much longer, I need to pack my Ristola along with me and get my dispatcher to send me to your area. All the different aspects of woods, pickups and electronics fascinate me, but I still believe most of an instrument's tone comes from the player playing it. I'd like to see if my bass sounds more like "you" when you're playing it and vice versa if I played your bass.
-Derwin