For extrasolar colonization efforts, I've since developed the below ship:
Cincinatti class Colony Tender 101,000 tons 453 Crew 2,742.3 BP TCS 2,020 TH 5,000 EM 0
2475 km/s JR 2-25(C) Armour 1-193 Shields 0-0 HTK 68 Sensors 0/0/0/0 DCR 1 PPV 0
MSP 10,416 Max Repair 1250 MSP
Cargo 25,000 Cryogenic Berths 20,000 Cargo Shuttle Multiplier 1 Tractor Beam
Commander Control Rating 1 BRG
Intended Deployment Time: 3 months
Terraformer: 1 modules producing 0.0008 atm per annum
Guild JC101K Commercial Jump Drive Max Ship Size 101000 tons Distance 25k km Squadron Size 2
Guild Commercial Magnetic Fusion Drive EP5000.00 (1) Power 5000 Fuel Use 1.12% Signature 5000 Explosion 5%
Fuel Capacity 10,001,000 Litres Range 1,594 billion km (7454 days at full power)
Refuelling Capability: 50,000 litres per hour Complete Refuel 200 hours
Ordnance Transfer Rate: 40 MSP per hour
Chaimberlin-Sherman Active Search Sensor AS11-R1 (20%) (1) GPS 28 Range 11.2m km MCR 1m km Resolution 1
This design is classed as a Commercial Vessel for maintenance purposes
This ship reduces my reliance on several other ship classes and dramatically reduces my need to micromanage multiple fleets. With this one ship class, I can completely colonize a new system without building any other commercial ships (except fuel harvesters, which remain a separate dedicated class).