These are the RB Gretsch (besides two snares not pictured) I own. (Since 1975 and 76)
I did own a Yellow (Gold) Satin Flame set but sold that around year 2000.
So. The 16x16 Red Glass I converted to use as Bass drum. Coated Ambassador batter Fiberskyn resonant. the 8x12 Red Glass (1968 hex head drum) Fiberskyn batter. Coated Ambassador resonant. the Red Wine Pearl (1966 set round head screws) 8x12 Fiberskyn coated ambassador resonant. 14x14 Fiberskyn batter. Clear resonant. The 14x 20 bass (is the worst offender) Fiberskyn 3 batter. Clear Pinstripe resonant.
Snares, 12s, 14s, 16s, aren't tight fitting. 20" bass drums (pearl covered) are possibly the worst. Stock heads will not go on BUT believe it or not "tune" anyway. Once hoops Ts and rods are on; I don't see/think it (tight head) makes much difference.
I don't carry the 20" bass out often. I use the 16" 12" (red Glass) and 14" (Red Wine pearl) a lot.
I also own- bought new- old stock still sitting in the Gretsch warehouse- direct from them thru a dealer in 2010:
14 x 18, 9 X 10, 10 X 12. and 12 X 14 Satin Rosewood Gunmetal Broadkaster 6 Ply.
Head fitting not an issue (still on all stock heads) on them.
I have never bought oversize heads for any of my RB drums. I have the 16" mini set (with the 20" bass option I never use) and the 18" Broadkaster 6P set. I have from my RB over the years, 1-12 1-14 and 1-20" original Round Badge head(s). in my stock of heads. If "I cared" about that 20 and needed to use it I might go for some oversized say Aquarian vintage. But haven't had to and it sounds thunderous enough