Why not use ships of smaller WWII nations as Neutrals?
For example:
BB and BC - Battleship and Battlecruiser
Yavuz class (Turkey) 5 - Dual 11" 50cal / 23,100 tons
1047 class (Dutch) 3 - Triple 11.1" (45, 50, or 54.5 cal) / 27,500 - 29,251 tons
Minas Gerais class (Brazil) 6 - Dual 12" 45cal / 19,200 tons
Rivadavia class (Argentina) 6 - Dual 12" 50 cal / 27,500 tons
Almirante Latorre class (Chile) 5 - Dual 14" 45cal / 25,000 tons
CA - Heavy Cruiser
Sverige class (Sweden) 2 - Dual 11" 45cal / 7,185 tons
Shropshire class (Australia) 4 - Dual 8" 50cal / 9830 tons
Vainamoinen class (Finland) 2 - Dual 10" 46cal / 3900 tons
Norge class (Norway) 2 - Dual 8.2" 44cal / 4166 tons
Dhonburi class (Siam) 2 - Dual 8" ?cal / 2265 tons
General Belgrano class (Argentina) 5 - Triple 6" 47cal / 10,234 tons
Pueyrredon class (Argentina) 2 - Single 10" 40cal / 6840 tons
Capitan Prat class (Chile) 4 - Single 9.4" 30cal / 6902 tons
CL - Light Cruiser
Hobart class (Australia) 4 - dual 6" ?cal / 7105 tons
Adelaide class (Australia) 9 - Single 6" 50cal / 5100 tons
Ontario class (Canada) 3 - Triple 6" ?cal / 8000 tons
De Zeven Provincien class (Netherlands) 4 - Dual 5.9" ?cal / 8350 tons
Java class (Netherlands) 10 - Single 5.9" 50cal / 6670 tons
Galacia class (Spain) 4 - Dual 6" 50cal / 8250
Mendez Nunez class (Spain) 8 - Single 6" 50cal / 4680 tons
Almirante Brown class (Argentina) 3 - Dual 7.5" 52cal / 6,800 tons
Barrosa class (Brazil) 6 - Single 6" 50cal / 3450 tons
Bahia class (Brazil) 10 - Single 4.7" 50cal / 3000 tons
What do you think? I can post more info on each if you want. Not from wiki though. I use "Jane's Fighting S