I think my answer to your last question-get what you want now or later-rather depends on your overall setup and intentions. Are these to be pets or livestock you'll be culling? Do you have ready options for re-homing down the road if necessary? If they're livestock or easy to rehome, there's no harm in starting with something wallet friendly, learn the ins and outs better, experiment, etc. because you can always get rid of them and get the breeds you want down the line.
If they're to be pets and allowed to live their natural lifespan, that's a commitment of years so I'd get what I wanted now.
If you have a good amount of land, resources, and time, then even if they're pets, when chicken math kicks in (4-6 means you'll have at least 12 eventually, barring interference from a government entity lol) you can add the breeds that you're eyeing now.
As far as the specific breeds you mentioned go... I have wyandottes, which are docile but not particularly friendly once grown, a speckled sussex, who is hands down my favorite hen of something like 10 adult breeds I have on hand for overall friendliness, curiosity, and work ethic, a buff Orpington, docile but not very bright or a lap chicken by any means, and EES. The Easter eggers are all over the place. One is more skittish than my Ancona, Leghorn hybrid, or golden campine. One is very chill and relaxed, not a lap chicken but will lay near me and take a dust bath. One follows me everywhere but runs if I try to pick her up. One eyes me suspiciously at all times but doesn't outright avoid me. I imagine it depends a lot on the individual bird and breeder.
As an aside, I started last spring wanting 5-10 hens, various breeds because I didn't know what I wanted. Some common, some rare. Now I have 16 laying hens and another 8-15 (some haven't been sexed yet) pullets, composed of 20 breeds if we count different patterns as different breeds (silver pencilled rock and barred rock, white/splash/black copper/blue copper marans, etc). I have the space and time I can do that, and I found both breeds I won't get again (RIR), breeds I'd consider for breeding purposes but not pets (barred rock), breeds I love for everything except eggs (sussex...not a bad layer but nothing outstanding on quantity or quality of her eggs)...you get the idea. Plus, when I started I wanted them for pets and entertainment, with eggs as a happy aside. That changed when the eggs started rolling in!
this year I've added the breeds I chose for color and size variety.
The end point of all this rambling is basically, there's a ton of variables that go into deciding on breeds and even knowing the basics of what you want, things can change and chickens can be such individuals your best bet is just to think about "what ifs" and plan for them where possible. If you absolutely know you will only have 4-6, and have any doubt regarding rehoming/culling, I'd talk to people with the breeds you want but are pricier, make sure they're appropriate for your situation, and if possible get them from those people so you know the breeder has been breeding for docility, for example.
I would really like to add some some and we are looking at barred rock and Easter Egger.
