I own all of those amps. They are all great in their own way. Only you can decide which is best for you. Go play a bunch of amps!
I learned to play through a blackface Fender. IMHO the AD200B is about as close as you can get. Feels like home. One big difference is the AD200B has a pretty high gain preamp and a Master. Max out the Master and set your level with the Gain and you get Fender. Dial the Master down and crank up the Gain and the preamp does sort of a modern OD. It's real easy to dial in huge lows with this amp, but it does not have enough headroom to really support it at gig volume. If you push the output section with the lows cranked, the lows gets mushy and wash out way to early. Keep the lows at a reasonable level and

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Old School Mesa is in the same Fender tone universe, but not as close to the center as the AD200B. I have the D180, 400, 400+, Buster, and Strategy Eight:88.
It's real easy to hear the evolution that occurred through D180, 400, and 400+. I think my favorite is probably the 400, but my preference can change depending on what I want. The D180 is voiced the leanest down low and the amp's intrinsic voicings became fuller with each model. The 400+ kicks like mule. The highs sort of went the other way over the evolution. The D180 has the most air and glass and the 400+ has the least. IMHO the 400 seems to strike the best balance and has the overall sweetest sound...but there are things the D180 and 400+ do better.
The Strategy is a beast, but I found it hard to dial in. It's fairly lean down low and super aggressive in the high mids.
I finally figured out a few tricks after reviewing the Strategy's frequency response plots in BGM's Amp Lab.
Amp Lab: Mesa Boogie Strategy | Bass Gear Magazine The frequency response rises into the high mids and then rolls off fairly early. The resultant tone tends to have a lot of gank, clack, and fret rattle, but lacks air or glass.
I found that by turning down the Treble rotary I can tame the high mids. Then I can use the top two sliders on the graphic to dial in the glass and air that I like.
The flat tone profile (Voicing #3) on this amp rolls off the lows at pretty high frequency. Voicing #2 is slightly mid scooped, but extends the response significantly lower.
Now I have the Strategy dialed in so it sounds more like an old school Mesa bass amp.
The Buster is also fairly lean down low and aggressive in the high mids. However, I think it has more air up top than the Strategy. If you try to push the lows I think the tone gets sort of blurry or woolly. You can push Buster so it gets sort of tubey and compressed, but it does not have the woody resonance and bounce of the earlier Mesas.
IMHO neither the Buster nor Strategy really excel at OD. The earlier are better for pushed tones.
The first bass amp I ever bought was a new MTI SVT and 810. Great rig but not my sound. I like SVTs way more than 810s though. I own a 69 and an 87 SVT, but no 810. To me SVTs seem warmer and less bright than most other amps. Also they get sort of signature grind in the mids and have what I call a low mid push.
I tend to rotate through my collection. When I put any of these amps in the playing position, I think think they sound great. But over a few playing sessions I sort of grow bored and want to hear something else.
One noteworthy tone universe you seem to be ignoring is Hiwatt. I have two vintage Hiwatts (76 DR201 and 79 DR103) and a big Reeves 400, which is a fairly faithful DR405 clone.
Many people describe Hiwatts as high fidelity. In my experience they seem setup to make max clean headroom. I would not say the output sections are the best choice if you want to push them into drive though. The preamps are fairly low gain, but can be pushed in to light OD. The frequency response is far from flat: huge lows, mid scooped, and aggressive in the high mids. To me the voicing seems very warm with guitar but extremely mid-scooped and bright with bass guitar. Fabulous amps, but if you don't love the basic voicing, the tone controls are not going to help.