The 45,000 ton battlecruiser also works well

One of the keys to success for the GB/CB/1915 battlecruiser is that the design is pretty conservative. I used an armour basis of 12in. The main armament is just 8-15in guns. The speed is just 30 knots. The resulting ship is better protected than the Hood, as it uses the "all or nothing" principle. The dimensions are Hood-like, but the hull is flush-decked. This is the Springsharp report:

GB/CB/1915 45,000 tons, Great Britain Battlecruiser laid down 1915 (Engine 1927)

Displacement:
 43,283 t light; 45,013 t standard; 49,000 t normal; 52,190 t full load

Dimensions: Length overall / water x beam x draught
 857.24 ft / 855.00 ft x 105.00 ft x 32.00 ft (normal load)
 261.29 m / 260.60 m x 32.00 m  x 9.75 m

Armament:
      8 - 15.00" / 381 mm guns (4 mounts), 1,687.50lbs / 765.44kg shells, 1915 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 5 raised guns - superfiring
      20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1915 Model
   Quick firing guns in turrets (on barbettes)
   on side, all amidships, 6 raised mounts - superfiring
 Weight of broadside 14,750 lbs / 6,690 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 540.00 ft / 164.59 m 17.00 ft / 5.18 m
 Ends: Unarmoured
   Main Belt covers 97 % of normal length

   - Torpedo Bulkhead:
  4.00" / 102 mm 540.00 ft / 164.59 m 32.00 ft / 9.75 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 9.00" / 229 mm  12.0" / 305 mm
 2nd: 5.00" / 127 mm 5.00" / 127 mm  5.00" / 127 mm

   - Armour deck: 5.00" / 127 mm, Conning tower: 12.00" / 305 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 162,313 shp / 121,085 Kw = 30.00 kts
 Range 7,500nm at 18.00 kts
 Bunker at max displacement = 7,177 tons

Complement:
 1,646 - 2,140

Cost:
 £5.500 million / $21.998 million

Distribution of weights at normal displacement:
 Armament: 1,844 tons, 3.8 %
 Armour: 17,979 tons, 36.7 %
    - Belts: 4,721 tons, 9.6 %
    - Torpedo bulkhead: 2,557 tons, 5.2 %
    - Armament: 4,298 tons, 8.8 %
    - Armour Deck: 6,056 tons, 12.4 %
    - Conning Tower: 346 tons, 0.7 %
 Machinery: 5,124 tons, 10.5 %
 Hull, fittings & equipment: 18,336 tons, 37.4 %
 Fuel, ammunition & stores: 5,717 tons, 11.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   79,521 lbs / 36,070 Kg = 47.1 x 15.0 " / 381 mm shells or 14.1 torpedoes
 Stability (Unstable if below 1.00): 1.09
 Metacentric height 6.3 ft / 1.9 m
 Roll period: 17.6 seconds
 Steadiness - As gun platform (Average = 50 %): 65 %
   - Recoil effect (Restricted arc if above 1.00): 0.66
 Seaboat quality  (Average = 1.00): 1.29

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.597
 Length to Beam Ratio: 8.14 : 1
 'Natural speed' for length: 29.24 kts
 Power going to wave formation at top speed: 49 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 4.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  32.00 ft / 9.75 m
    - Forecastle (20 %): 25.00 ft / 7.62 m
    - Mid (50 %):  25.00 ft / 7.62 m
    - Quarterdeck (15 %): 25.00 ft / 7.62 m
    - Stern:  25.00 ft / 7.62 m
    - Average freeboard: 25.56 ft / 7.79 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 77.5 %
  - Above water (accommodation/working, high = better): 189.4 %
 Waterplane Area: 65,475 Square feet or 6,083 Square metres
 Displacement factor (Displacement / loading): 114 %
 Structure weight / hull surface area: 196 lbs/sq ft or 958 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.99
  - Longitudinal: 1.14
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily